This is the sample code for Part3 Programming in Urdu.

Strings_Dart_Lesson_Part3.dart

void main() {
  var myString1 = "My String 1";
  var myString2 = "My String 2";
  
  var myString3;
  
  //myString3 = myString1 + myString2;
  
  //myString3 = 'My String 1' '\nMy String 2';
  
  var count = 1;
  
  print('My count is: $count');
  
  count = 2;
  print('My count is: $count');
  
  var string = 'Dart is fun';
  var newString = string.substring(0, 8);
  
  print(myString1.length);
}