Comparison operators

Learn to compare values with ==, !=, <, >, <= and >=.

Comparison operators compare two values and return a bool (true/false). Six basic operators: ==, !=, <, >, <=, >=.

Important: = is assignment, == is equality comparison. x = 5 assigns 5 to x; x == 5 asks whether x equals 5.

Since the result is a bool, it is used in if conditions: if (age >= 18) { print('Adult'); }.

Exercise Print comparisons

Write print(5 == 5), print(3 != 7) and print(4 < 10) inside void main().

Show example solution

void main() {
  print(5 == 5);
  print(3 != 7);
  print(4 < 10);
}

Declare var score = 75;. Check with if (score >= 50) and print print('Passed').

Show example solution

void main() {
  var score = 75;
  if (score >= 50) {
    print('Passed');
  }
}

Not equal

if (a ____ 5) { print('different'); }

Show answer

if (a != 5) { print('different'); }