Dart : Printing integer along with string

Just add toString() to your int. Similar to JS.

void main() {
  int num = 5;
  print('The number is ' + num.toString()); // The number is 5
}

In order to print the value of the int along with the String you need to use string interpolation:

void main() {
  int num = 5;
  print("The number is $num");
}