{"id":357,"date":"2020-03-02T09:00:12","date_gmt":"2020-03-02T00:00:12","guid":{"rendered":"http:\/\/mobilelab.khu.ac.kr\/?p=357"},"modified":"2020-04-04T22:17:07","modified_gmt":"2020-04-04T13:17:07","slug":"be-dart-programmer-07","status":"publish","type":"post","link":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/2020\/03\/02\/be-dart-programmer-07\/","title":{"rendered":"Dart Programmer \ub418\uae30 [07]"},"content":{"rendered":"\n

< Dart \uae30\ucd08\ubb38\ubc95 – Variables & Constants ><\/h4>\n\n\n\n

\ucd5c\ucd08\uc758 \uc804\uc790\uc2dd \ub514\uc9c0\ud138 \ucef4\ud4e8\ud130\ub294 Compute\/r\uac00 \uc758\ubbf8 \ud558\ub4ef\uc774 \uacc4\uc0b0\uc744 \ud558\ub294 \uac83\uc774 \uc8fc\ubaa9\uc801 \uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c, “X = 1, Y = 2, Z = X + 1″\uacfc \uac19\uc774 \uc0b0\uc218\/\uc218\ud559\uc744 \uc9c0\uc6d0\ud558\ub294 \uac83\uc744 \uae30\ucd08\ub85c \ud569\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uc6b0\ub9ac\ub294 \uc774\ubbf8 X, Y, Z\ub97c \ubcc0\uc218\ub77c\uace0 \ud558\ub294\ub370, \uc774\ub294 \ubcc0\ud558\ub294 \uac12\uc774\ub77c\ub294 \uc758\ubbf8\uc785\ub2c8\ub2e4. \uc0c1\uc218\ub294 \uc218\ud559\uc758 \uc6d0\uc8fc\uc728\uc778 pi \ucc98\ub7fc 3.141592…\uc758 \uac12\uc774 \uc774\ubbf8 \uace0\uc815\ub418\uc5b4\uc11c, \ubcc0\uacbd\ub418\uc9c0 \uc54a\ub294 \uac83\uc73c\ub85c \uc774\ubbf8 \uc54c\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ubaa8\ub4e0 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub294 \uc774\ub7ec\ud55c \uae30\ub2a5\uc744 \uadf8\ub300\ub85c \ubcc0\uc218(variables)\uc640 \uc0c1\uc218(constants)\ub77c \ubd80\ub985\ub2c8\ub2e4. Dart\uc5d0\uc11c \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ud558\ub294\uc9c0 \uc54c\uc544\ubd05\ub2c8\ub2e4.<\/p>\n\n\n\n

\ubcc0\uc218 (Variables)<\/h4>\n\n\n\n

\ubc14\ub85c \ucf54\ub4dc\ub85c \uc2dc\uc791\ud574 \ubd05\ub2c8\ub2e4. Be.Programmer [6] \uae00\uc744 \ud1b5\ud574\uc11c \uc54c\uac8c\ub41c \uc791\uc5c5\uc6a9 \ud3f4\ub354 \ub9cc\ub4e4\uae30 \ud6c4, \ub2e4\uc74c darttutorial-07-01.dart\uc758 \uc18c\uc2a4 \ud504\ub85c\uadf8\ub7a8\uc744 \ud0c0\uc774\ud551 \ud558\uace0, \uc2e4\ud589\ud569\ub2c8\ub2e4. \ubc18\ub4dc\uc2dc 1) \ud3f4\ub354\ub97c \ub9cc\ub4e4\uace0, 2) \ud3f4\ub354\uc5d0 dart \ud654\uc77c\uc744 \uc800\uc7a5\ud558\uace0, 3) main()\uc774 \uc788\ub294 dart \ud654\uc77c\uba85\uc774 \uc81c\ub300\ub85c launch.json \ud654\uc77c\uc758 program \ud544\ub4dc\uc5d0 \uc801\ud600 \uc788\ub294\uc9c0 \ud655\uc778\ud558\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n\n\n\n

\/\/ darttutorial-07-01.dart\n\nvoid main() {\n  int myInt = 1;\n  double myDouble = 1.0;\n  String myString = \"Dr.Sungwon\";\n\n  print(\"$myInt $myDouble $myString\");\n}<\/pre>\n\n\n\n
Be.Programmer [6]\uc5d0\uc11c \uc5b8\uae09\ud55c \uac83 \ucc98\ub7fc, void main() {\uacfc }\ub294 \ud5a5\ud6c4 \uc124\uba85\ud558\uba74, \uadf8 \uc0ac\uc774\uc5d0 \uc788\ub294 \ub0b4\uc6a9\uc744 \ub2e4\ub8e8\ub294 \uac83\uc774 \uc774\ubc88 \uae00\uc758 \ubc94\uc8fc \uc785\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \uac01\uac01\uc5d0 \ub300\ud574\uc11c \ud55c\uc904\uc529 \uc124\uba85 \ud569\ub2c8\ub2e4. \ucc38\uace0\ub85c darttutorial-07-01.dart \ud504\ub85c\uadf8\ub7a8\uc758 \ucd9c\ub825 \uac12\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n
1 1.0 Dr.Sungwon<\/pre>\n\n\n\n
int myInt = 1;<\/em> \uba3c\uc800, Dart \uc5b8\uc5b4\uc5d0\uc11c \ud558\ub098\uc758 \uc758\ubbf8 \uc788\ub294 \uad6c\ubb38\uc758 \ub05d\uc740 ‘;’\ub85c \ubc18\ub4dc\uc2dc \ub9c8\uccd0\uc57c \ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc774\uc720\ub85c \uc774\ud6c4\uc758 \ubaa8\ub4e0 \ub77c\uc778\ub4e4\ub3c4 ‘;’\ub85c \ub05d\ub098\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4. Dart \uc5b8\uc5b4\ub294 \ub2e4\uc591\ud55c \ud0c0\uc785\uc758 \ub370\uc774\ud0c0\ub97c \ucc98\ub9ac\ud560 \uc218 \uc788\ub294\ub370, \uc5ec\uae30\uc11c int\ub294 integer\uc758 \uc57d\uc790\ub85c\uc11c \uc815\uc218\ub97c \ucc98\ub9ac\ud560 \uc218 \uc788\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc815\uc218\uc5d0 \ub300\ud55c \uc124\uba85\uc740 \ucd94\ud6c4 \ub370\uc774\ud0c0 \ud0c0\uc785\uc5d0 \ub300\ud55c \uad6c\uccb4\uc801\uc778 \uc124\uba85\uc5d0\uc11c \uc218\ud589\ud560 \uc608\uc815\uc774\uba70, \ub2f9\uc7a5\uc740 \uc218\ud559\uc758 \uc815\uc218\ub97c \ub2e4\ub8ec\ub2e4\uace0 \ubcf4\uba74 \ub429\ub2c8\ub2e4. Dart \uc5b8\uc5b4\uc5d0\uc11c \uc815\uc218\ub97c \ub2e4\ub8e8\uace0 \uc2f6\ub2e4\uba74, \uc815\uc218\uc5d0 \uc774\ub984\uc744 \ubd99\uc5ec\uc57c \ud558\ub294\ub370, \uc9c0\uae08\uc740 myInt \ub77c\ub294 \uc774\ub984\uc73c\ub85c \ubcc0\uc218\ub97c \ud558\ub098 \ub9cc\ub4e0 \uac81\ub2c8\ub2e4. \uc774\ub807\uac8c Dart \uc5d0\uc11c\ub294 \ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\uace0 \uc2f6\uc73c\uba74, \uba3c\uc800 \ud0c0\uc785 \uc774\ub984\uc744 \uc55e\uc5d0 \uc801\uace0, \uadf8 \ub2e4\uc74c\uc5d0 \uc0ac\uc6a9\ud558\uace0\uc790 \ud558\ub294 \ubcc0\uc218\uc758 \uc774\ub984\uc744 \uc801\uc2b5\ub2c8\ub2e4. \ub9cc\uc57d, \ubcc0\uc218\ub97c \ub9cc\ub4e4\uba74\uc11c \ud2b9\uc815 \uac12\uc73c\ub85c \ucd08\uae30\ud654\ub97c \uc6d0\ud55c\ub2e4\uba74, \uc608\uc81c\ucc98\ub7fc 1\uc758 \uac12\uc744 \uc800\uc7a5\ud55c\ub2e4\ub294 \uc758\ubbf8\ub85c “=” \uae30\ud638\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc774\ub294 \uc218\ud559\uacfc \uac19\uc2b5\ub2c8\ub2e4. \uacb0\ub860\uc801\uc73c\ub85c \uc774 \uc904\uc740 \uc815\uc218\ub97c \uc800\uc7a5\ud558\ub294 \uc6a9\ub3c4\ub85c myInt \ubcc0\uc218\ub97c \ub9cc\ub4e0\ud6c4, 1\uc758 \uac12\uc744 \ucd08\uae30\ud654 \uac12\uc73c\ub85c \uc800\uc7a5\ud55c\ub2e4\ub294 \uc758\ubbf8\uc785\ub2c8\ub2e4. \uc5ec\uae30\uc11c \uaf2d int\uc640 \uac19\uc774, \uc800\uc7a5\ud560 \uac12\uc744 \ubbf8\ub9ac \uc608\uce21\ud574\uc11c \uc77c\uc77c\uc774 \uc801\uc5b4\uc57c \ud558\ub0d0\uace0 \ubb3b\ub294\ub2e4\uba74, \uaf2d \uadf8\ub807\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4. Dart \uc5b8\uc5b4\ub294 \ud0c0\uc785\uc744 \uc9c0\uc815\ud560 \uc218\ub3c4 \uc788\uace0, \ubc11\uc5d0 \uc124\uba85\ud558\ub4ef\uc774 Dart\uac00 \ud0c0\uc785\uc5d0 \ub9de\ucdb0\uc11c \uc54c\uc544\uc11c \ucc98\ub9ac\ud558\ub3c4\ub85d \ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.  <\/p>\n\n\n\n
double myDouble = 1.0;<\/em> \uc55e\uc11c\uc640 \uc720\uc0ac\ud55c \uc758\ubbf8\uc778\ub370, double\uc740 double \ud639\uc740 floating-point \ub77c\uace0 \ud574\uc11d\ud558\uc5ec \uc2e4\uc218\ud615 \ubcc0\uad6c\ub97c \uc9c0\uce6d\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c, \uc774 \uc904\uc740 myDouble \uc774\ub77c\ub294 \uc774\ub984\uc73c\ub85c \uc2e4\uc218\ub97c \uc800\uc7a5\ud560 \ubcc0\uc218\ub97c \ub9cc\ub4e4\uace0, 1.0\uc758 \uac12\uc73c\ub85c \ucd08\uae30\ud654\ub97c \ud55c\ub2e4\ub294 \uc758\ubbf8\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n
String myString = “Dr.Sungwon”;<\/em> \ucef4\ud4e8\ud130\uac00 \ub2e4\ub8e8\ub294 \ub370\uc774\ud0c0\uac00 \uc22b\uc790\uc5d0 \uad6d\ud55c\ub418\uc9c0\ub294 \uc54a\uc2b5\ub2c8\ub2e4. String \ud0c0\uc785\uc740 \uc601\uc5b4 \ub2e8\uc5b4\uac00 \uc758\ubbf8 \ud558\ub4ef\uc774, \ubb38\uc790\uc5f4(string)\uc744 \ub2e4\ub8e8\ub294 Dart\uc758 \ub370\uc774\ud0c0 \ud0c0\uc785\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc9c0\uae08\uc740, \uae00\uc744 \uc791\uc131\ud560\ub54c \ub9d0\uc744 \ud558\ub294 \uac83\uc744 \uc758\ubbf8\ud558\ub294 \uc778\uc6a9 \uad6c\ubb38\uc778 ” ” \uae30\ud638\ub97c \uc0ac\uc6a9\ud558\uc5ec, “Dr.Sungwon”\uc774\ub77c\ub294 \uae00\uc790\ub97c \ub9cc\ub4e0\ud6c4, myString \ubcc0\uc218\uc5d0 \uc800\uc7a5\ud558\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n
\uc9c0\uae08\ucc98\ub7fc integer, double, String\uacfc \uac19\uc740 \uad6c\uccb4\uc801\uc778 \ud0c0\uc785\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubcc0\uc218\ub97c \ub9cc\ub4dc\ub294 \ubc29\uc2dd\uc740 \ub2e4\ub8e8\uace0\uc790 \ud558\ub294 \uac12\uc758 \ud0c0\uc785\uc774 \ubc14\ub00c\uc9c0 \uc54a\ub294 \ub2e4\ub294 \uc804\uc81c\uc5d0\uc11c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ub9cc\uc57d \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc758 \ubcc0\uc218\ub4e4 \uac04\uc5d0 \uac12\uc744 \uc8fc\uace0 \ubc1b\ub3c4\ub85d \ud558\ub824 \ud558\uba74, \ub2e4\uc74c\uacfc \uac19\uc774 \uc5d0\ub7ec\uac00 \ub098\ud0c0\ub0a8\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub9bc\uc5d0\uc11c myDouble = myInt;\uc640 myString = myInt;\ucc98\ub7fc \ud558\uc5ec \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc73c\ub85c \uac12\uc744 \uc804\ub2ec\ud558\uac8c \ud558\uc600\ub294\ub370, \uc774\ubbf8 \uc2e4\ud589\uc804\uc5d0 MSVC\uc5d0\uc11c \ubd89\uc740 \uc0c9\uc73c\ub85c \uc5d0\ub7ec\uac00 \uc788\uc74c\uc744 \ubcf4\uc5ec\uc8fc\uace0 \uc788\uc73c\uba70, \uc774\ub97c \ubb34\uc2dc\ud558\uace0 \uc2e4\ud589\uc744 \ud558\uba74 \uc5d0\ub7ec\uac00 \ub0a0 \uac83\uc774\ub77c\ub294 \uacbd\uace0\ub97c \ubcf4\uc5ec\uc8fc\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\ubcc0\uc218\ub97c \ub9cc\ub4e4\ub54c, \uad73\uc774 \uc800\uc7a5\ub418\ub294 \uac12\uc744 \uc0dd\uac01\ud558\uc9c0 \uc54a\uace0 \ub9cc\ub4e4\uace0 \uc2f6\ub2e4\uba74, var \ubb38\ubc95\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. darttutorial-07-01.dart\uc5d0\uc11c \uad6c\uccb4\uc801\uc73c\ub85c \ud0c0\uc785\uc744 \uc815\uc758\ud55c \uac83\uc744 var \ubb38\ubc95\uc73c\ub85c \ubc14\uafbc \uc608\uc81c \ud504\ub85c\uadf8\ub7a8\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n
\/\/ darttutorial-07-02.dart\n\nvoid main() {\n  var myInt = 1;\n  var myDouble = 1.0;\n  var myString = \"Dr.Sungwon\";\n\n  print(\"$myInt $myDouble $myString\");\n}<\/pre>\n\n\n\n
\ud504\ub85c\uadf8\ub7a8\uc758 \uc218\ud589\uacb0\uacfc\ub294 1 1.0 Dr.Sungwon \ub85c \uc81c\ub300\ub85c \ucd9c\ub825\ud558\ub294 \uac83\uc744 \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc var \ubb38\ubc95\uc744 \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0\ub3c4, \uc55e\uc11c \uc124\uba85\ud55c \uac83\ucc98\ub7fc, \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc758 \uac12\uc744 \uc8fc\uace0 \ubc1b\ub294 \ubc29\uc2dd\uc740 \uc5d0\ub7ec\ub97c \ub9cc\ub4ed\ub2c8\ub2e4. \uc774\ub7f0 \ubc29\uc2dd\uc744 static type \uc774\ub77c\uace0 \ubd80\ub974\uba70, \ubd88\ud3b8\ud560\uc9c0 \ubaa8\ub974\uaca0\uc9c0\ub9cc \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc758 \uac12\ub4e4\uc744 \uc8fc\uace0 \ubc1b\uc73c\uba74\uc11c \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc5d0\ub7ec\ub97c \uc5b5\uc81c\ud558\ub294 \ud6a8\uacfc\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. C++\uc758 \uacbd\uc6b0\ub3c4 \uc774\ub807\uac8c static\ud55c type checking\uc744 \uc9c0\uc6d0\ud558\ub294 \uc5b8\uc5b4\uc785\ub2c8\ub2e4. \ud558\uc9c0\ub9cc, \ucd5c\uadfc\uc758 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub4e4\uc740 \ubcc0\uc218\ub97c \ub9cc\ub4e4\ub54c \ud0c0\uc785\uc744 \uc9c0\uc815\ud558\uc9c0\ub3c4 \uc54a\uc73c\uba70, \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc758 \uac12\ub4e4\uc744 \uc11c\ub85c \uc8fc\uace0 \ubc1b\ub294 \uac83\uc774 \uc6d0\ud65c\ud569\ub2c8\ub2e4. Dart\ub294 \uc774\ub7f0 dynamic type \ubc29\uc2dd\ub3c4 \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc758 \ubcc0\uc218\ub4e4 \uac04\uc5d0 \uc790\uc720\ub86d\uac8c \ub370\uc774\ud0c0\ub97c \uc8fc\uace0 \ubc1b\ub294 \uc18c\uc2a4 \ucf54\ub4dc\ub294 \uc544\ub798\uc758 darttutorial-07-03.dart\uacfc darttutorial-07-04.dart \ucc98\ub7fc var \ubb38\ubc95 \ub300\uc2e0 Object \ubb38\ubc95\uc744 \uc0ac\uc6a9\ud558\uba74 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n
\/\/ darttutorial-07-03.dart\n\nvoid main() {\n  Object myInt = 1;\n  Object myDouble = 1.0;\n  Object myString = \"Dr.Sungwon\";\n  Object temp;\n\n  temp = myInt;\n  myInt = myDouble;\n  myDouble = myString;\n  myString = temp;\n\n  print(\"$myInt $myDouble $myString\");\n}<\/pre>\n\n\n\n
Object \ub300\uc2e0 \uc544\ub798\ucc98\ub7fc dynamic \ubb38\ubc95\uc744 \uc0ac\uc6a9\ud558\uc5ec\ub3c4 \ub3d9\uc77c\ud55c \ub3d9\uc791\uc744 \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n
\/\/ darttutorial-07-04.dart\n\nvoid main() {\n  dynamic myInt = 1;\n  dynamic myDouble = 1.0;\n  dynamic myString = \"Dr.Sungwon\";\n  dynamic temp;\n\n  temp = myInt;\n  myInt = myDouble;\n  myDouble = myString;\n  myString = temp;\n\n  print(\"$myInt $myDouble $myString\");\n}<\/pre>\n\n\n\n
\ub450 \ud504\ub85c\uadf8\ub7a8\uc758 \uc218\ud589 \uacb0\uacfc\ub294 \ubaa8\ub450 1.0 Dr.Sungwon 1 \uc785\ub2c8\ub2e4. \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uc758 \ubcc0\uc218\ub4e4\ub07c\ub9ac \uac12\uc744 \uc8fc\uace0 \ubc1b\uc544\ub3c4 \ubb38\uc81c\uac00 \uc5c6\uc73c\ubbc0\ub85c, \uac1c\ubc1c\uc790\ub294 \uc800\uc7a5\ud560 \uc815\ubcf4\uc5d0\ub9cc \uc9d1\uc911\ud558\uace0, \uc774\ub4e4\uc758 \ud0c0\uc785\uc5d0 \ub300\ud574\uc11c\ub294 \uc2e0\uacbd\uc744 \uc4f0\uc9c0 \uc54a\uc544\ub3c4 \ub429\ub2c8\ub2e4. \uc774\ub807\uac8c \uc11c\ub85c \ub2e4\ub978 \ud0c0\uc785\uac04\uc5d0 \uc815\ubcf4\ub97c \uc8fc\uace0 \ubc1b\ub294 dynamic \ud0c0\uc785\uacfc static \ud0c0\uc785\uc740 \uc11c\ub85c \ub2e4\ub978 \uc6a9\ub3c4\uc774\uc9c0, \uc5b4\ub290\ucabd\uc774 \uc88b\uace0 \ub098\uc058\ub2e4\ub77c\uace0 \ud558\ub294 \ubb38\uc81c\ub294 \uc544\ub2d9\ub2c8\ub2e4. \ub530\ub77c\uc11c, \ubcf8\uc778\uc774 \uc791\uc131\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc5c4\uaca9\ud55c \ud0c0\uc785 checking\uc774 \ud544\uc694\ud55c\uc9c0 \uc544\ub2cc\uc9c0\uc5d0 \ub530\ub77c\uc11c \uc120\ud0dd\ud558\uba74 \ub429\ub2c8\ub2e4.<\/p>\n\n\n\n
\ucc38\uace0\ub85c darttutorial-07-03.dart\uacfc darttutorial-07-04.dart \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c\ub294 \ubcc0\uc218 temp\ub97c \ub9cc\ub4dc\ub294 \uc21c\uac04\uc5d0 \ucd08\uae30\ud654 \uac12\uc744 \uc8fc\uc9c0\ub294 \uc54a\uc558\uc2b5\ub2c8\ub2e4. \uc774\ub7f0 \uacbd\uc6b0 Dart\ub294 \ud574\ub2f9 temp \ubcc0\uc218\uc758 \uac12\uc744 \uc790\ub3d9\uc73c\ub85c null<\/em>\ub85c \ucd08\uae30\ud654 \ud569\ub2c8\ub2e4. \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\uc5d0 \ub530\ub77c\uc11c \uc758\ubbf8\uc5c6\ub294 \uac12\uc774 \ub4e4\uc5b4\uac00\ub294 \uacbd\uc6b0\uac00 \uc788\ub294, \uc774\ub97c \ud1b5\uc0c1 garbage \uac12\uc774\ub77c\uace0 \ud569\ub2c8\ub2e4. Dart\ub294 \ucd08\uae30\ud654 \ub418\uc9c0 \uc54a\uc740 \ubcc0\uc218\uac00 null \uac12\uc744 \uac16\ub3c4\ub85d \ud568\uc73c\ub85c\uc11c, \uc774\ud6c4 \ubcc0\uc218\uc5d0 \uac12\uc774 \uc788\ub294\uc9c0 \uc5c6\ub294\uc9c0 \uc810\uac80\uc744 \uc6a9\uc774\ud558\uac8c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n
[\ucc38\uc870] print \uad6c\ubb38\uc73c\ub85c \ubcf5\uc218\uc758 \ubcc0\uc218 \uac12 \ucd9c\ub825\ud558\uae30<\/h4>\n\n\n\n
Hello World! \ud504\ub85c\uadf8\ub7a8\uc744 \ucd9c\ub825\ud560 \ub54c\ub294, print(“Hello World!”);<\/em>\ub97c \ud1b5\ud574\uc11c, “Hello World!” \ubb38\uc790\uc5f4\uc744 \ud654\uba74\uc5d0 \ucd9c\ub825\ud558\uc600\uc2b5\ub2c8\ub2e4. \uadf8\ub7f0\ub370 darttutorial-07-01.dart\uc5d0\uc11c\ub294 print(“$myInt $myDouble $myString”);<\/em>\ub85c \uc778\uc6a9\uad6c\ubb38\uc744 \uc0ac\uc6a9\ud55c \ubb38\uc790\uc5f4\uc758 \ucd9c\ub825\ucc98\ub7fc \ubcf4\uc774\uc9c0\ub9cc, \ub2e8\uc21c\ud558\uac8c \ubb38\uc790\uc5f4\uc744 \ucd9c\ub825\ud558\ub294 \uac83\uacfc \ub2e4\ub978 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. <\/p>\n\n\n\n
\uadf8\ub7ec\uba74, \ubb34\uc2a8 \uc758\ubbf8\uc778\uc9c0 \uc704\uc5d0\uc11c \ubbf8\ub9ac \ubcf4\uc5ec\uc900 \ucd9c\ub825 \uac12\uc73c\ub85c \ub3d9\uc791\uc744 \uc720\ucd94\ud574 \ubd05\ub2c8\ub2e4. darttutorial-07-01.dar\uc758 \ucd9c\ub825 \uac12\uc744 “1 1.0 Dr.Sungwon”\ub85c \ud558\uc600\ub294\ub370\uc694, print \uad6c\ubb38\uc758 \ucd9c\ub825 \ub0b4\uc6a9\uc758 \ubb38\uc790\uc5f4\uc5d0 ‘$’ \uae30\ud638\uac00 \uc788\uc73c\uba74, \ud574\ub2f9 \uae30\ud638 \ub4a4\uc758 \uc774\ub984\uc5d0 \ud574\ub2f9\ud558\ub294 \ubcc0\uc218(\ud639\uc740 \uc0c1\uc751\ud558\ub294 \ud0c0\uc785)\uc758 \uac12\uc744 \ucd9c\ub825\ud558\uac8c \ub429\ub2c8\ub2e4. \ub530\ub77c\uc11c, print \uad6c\ubb38\uc740 \uc21c\uc11c\ub300\ub85c myInt \ubcc0\uc218 \uac12\uc778 1, myDouble \ubcc0\uc218 \uac12\uc778 1.0 \uadf8\ub9ac\uace0 myString \ubcc0\uc218 \uac12\uc778 Dr.Sungwon\uc744 \ucd9c\ub825\ud558\uac8c \ub41c \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n
\uc774\ud6c4 \ubcf5\uc218\uc758 \uac12\uc744 \ucd9c\ub825\ud558\uae30 \uc704\ud55c \uc6a9\ub3c4\ub85c \uc694\uae30\ud558\uac8c \uc0ac\uc6a9\ud558\uae30 \ubc14\ub78d\ub2c8\ub2e4. print \uad6c\ubb38\uc740 \ub9e4\uc6b0 \ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \uc81c\uacf5\ud558\ubbc0\ub85c, \uc774\uc5d0 \ub300\ud55c \ubd80\ubd84\uc740 \ud544\uc694\ud560 \ub54c\ub9c8\ub2e4 \ud558\ub098 \ud558\ub098 \uc54c\uc544 \uac08 \uac83 \uc785\ub2c8\ub2e4. <\/p>\n\n\n\n
\uc0c1\uc218 (Constants)<\/h4>\n\n\n\n
\uc218\ud559\uc758 \uc0c1\uc218\uc758 \uac1c\ub150\ucc98\ub7fc, \ubcc0\ud558\uc9c0 \uc54a\ub294 \uac12\uc744 \uc758\ubbf8\ud558\uba70, Dart\ub294 \ub450\uac00\uc9c0 \ubc29\ubc95\uc73c\ub85c \uc0c1\uc218\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uccab\uc9f8\ub294 final \ubb38\ubc95\uc774\uba70, \ub458\uc9f8\ub294 const \ubb38\ubc95\uc785\ub2c8\ub2e4. \uc544\ub798\uc758 darttutorial-07-05.dart\ub294 \ub458\uc744 \uc0ac\uc6a9\ud55c \uc608\uc81c \ud504\ub85c\uadf8\ub7a8\uc774\uba70, \uc218\ud589\uacb0\uacfc\ub294 Sungwon Lee 3.141592 1.3 \uc785\ub2c8\ub2e4.<\/p>\n\n\n\n
\/\/ darttutorial-07-05.dart\n\nvoid main() {\n  final String firstName = \"Sungwon\";\n  final secondName = \"Lee\";\n\n  const double myPi = 3.141592;\n  const changeRate = 1.3;\n\n  print(\"$firstName $secondName $myPi $changeRate\");\n}<\/pre>\n\n\n\n
darttutorial-07-05.dart \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc0ac\uc6a9\ud558\ub294 firstName, secondName, myPi, changeRate\ub294 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uac12\uc744 \ubc14\uafc0\uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc218\ud559\uc758 \uc0c1\uc218\uc640 \uac19\uc774 \uace0\uc815\ub41c \uac12\uc744 \uc800\uc7a5\ud558\ub3c4\ub85d \ud569\ub2c8\ub2e4. \ucc28\uc774\uc810\uc740 \uac1c\ubc1c\uc790 \uc785\uc7a5\uc5d0\uc11c \ubbf8\ubb18\ud55c\ub370, const\ub294 \ub9d0 \uadf8\ub300\ub85c constant\ub85c\uc11c, Dart\ub85c \uc791\uc131\ud55c \ud504\ub85c\uadf8\ub7a8\uc744 \ucef4\ud4e8\ud130\uc5d0\uc11c \uc218\ud589\ud560 \uc218 \uc788\ub294 \ud615\ud0dc\ub85c \ubc14\uafd4\uc8fc\ub294 compile \uc2dc\uc810\uc5d0\uc11c \uc0c1\uc218\ub85c \ub9cc\ub4dc\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc774\uc5d0 \ubc18\ud558\uc5ec, final \ubb38\ubc95\uc740 \uc815\ud655\ud558\uac8c\ub294 “\ud504\ub85c\uadf8\ub7a8 \uc804\uccb4\uc5d0\uc11c \ud55c\ubc88\ub9cc \uac12\uc744 \uc800\uc7a5\ud560 \uc218 \uc788\ub294 \ubcc0\uc218”\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4. \ud558\uc9c0\ub9cc, \uac1c\ubc1c\uc790 \uc785\uc7a5\uc5d0\uc11c\ub294 \uc0c1\uc218 \uac12\uc744 \uc800\uc7a5\ud558\ub294\ub370 \uc0ac\uc6a9\ud568\uc5d0 \ud070 \ucc28\uc774\ub97c \ub290\ub07c\uae30\ub294 \uc5b4\ub835\uc2b5\ub2c8\ub2e4. final\uacfc const \ubb38\ubc95\uc744 \uc0ac\uc6a9\ud560\ub54c\ub294 darttutorial-07-05.dart \ucc98\ub7fc \uad6c\uccb4\uc801\uc778 \ud0c0\uc785\uc744 \uc801\uc5b4\uc904 \uc218\ub3c4 \uc788\uace0, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 final\uacfc const \ubb38\ubc95\ub9cc \uc0ac\uc6a9\ud558\uc5ec\ub3c4 \ubb34\ubc29\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n
\ub9c8\ubb34\ub9ac<\/h4>\n\n\n\n
\uc774 \uae00\uc5d0\uc11c\ub294 \ucef4\ud4e8\ud130 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uac00\uc7a5 \uae30\ucd08\uc801\uc778 \ub0b4\uc6a9\uc778 \ubcc0\uc218\uc640 \uc0c1\uc218\uc5d0 \ub300\ud574\uc11c \ub2e4\ub918\uc2b5\ub2c8\ub2e4. \ucef4\ud4e8\ud130\uc5d0\uc11c\uc758 \ubcc0\uc218\uc640 \uc0c1\uc218\ub294 \uc218\ud559\uacfc \uac19\uc740 \uc22b\uc790\ub97c \ub2e4\ub8f0\uc218\ub3c4 \uc788\uc9c0\ub9cc, \uae00\uc790 \ub4f1\uc758 \ub2e4\uc591\ud55c \ub370\uc774\ud0c0\ub97c \ub2e4\ub8f0 \uc218 \uc788\ub294 \uac1c\ub150\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
Creative Commons License<\/strong> (CC BY-NC-ND<\/strong>)<\/p>\n","protected":false},"excerpt":{"rendered":"
< Dart \uae30\ucd08\ubb38\ubc95 – Variables & Constants > \ucd5c\ucd08\uc758 \uc804\uc790\uc2dd \ub514\uc9c0\ud138 \ucef4\ud4e8\ud130\ub294 Compute\/r\uac00 \uc758\ubbf8 \ud558\ub4ef\uc774 \uacc4\uc0b0\uc744 \ud558\ub294 \uac83\uc774 \uc8fc\ubaa9\uc801 \uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c, “X = 1, Y = 2, Z = X …<\/p>\n","protected":false},"author":1,"featured_media":868,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[3],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/posts\/357"}],"collection":[{"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/comments?post=357"}],"version-history":[{"count":9,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/posts\/357\/revisions"}],"predecessor-version":[{"id":616,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/posts\/357\/revisions\/616"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/media\/868"}],"wp:attachment":[{"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=357"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mobilelab.khu.ac.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}