Assert

1. Definition

During development, use an assert statement to disrupt normal execution if a boolean condition is false.



2. Syntax



assert(<expppression>)


OR


assert(<expppression>,<Optional Message>)



3. Example



void main() {

  var nb = 6;

  assert(nb > 10, "You enter a number less than 10");

  print("Good Answer");

}





Unhandled exception:
'file:///C:/Users/marzo/Desktop/test/test.dart': Failed assertion: line 5 pos 10: 'nb > 10': You enter a number less than 10




void main() {

  var nb = 14;

  assert(nb > 10, "You enter a number less than 10");

  print("Good Answer");

}





Good Answer