Step 1 — Arithmetic operators

void main() {
  int a = 10;
  int b = 3;
  print(a + b);
  print(a - b);
  print(a * b);
  print(a ~/ b);
  print(a % b);
}

• + add, - subtract, * multiply.
• ~/ integer division, % remainder.

Step 2 — Comparison operators

void main() {
  int x = 5;
  int y = 10;
  print(x == y);
  print(x != y);
  print(x < y);
  print(x > y);
  print(x <= y);
  print(x >= y);
}

• == equal, != not equal.
• <, >, <=, >= for ordering.
• Result is a bool.

Step 3 — Logical operators

void main() {
  bool a = true;
  bool b = false;
  print(a && b);
  print(a || b);
  print(!a);
}

• && and, || or, ! not.

Step 4 — Combine in conditions

void main() {
  int age = 18;
  bool hasId = true;
  bool canEnter = age >= 18 && hasId;
  print(canEnter);
}

Quick reference

Practice tasks

• Compute and print: (15 + 7), (20 - 8), (6 * 7), (17 ~/ 4), (17 % 4).
• Compare two numbers with <, >, == and print the results.
• Write an expression: “age >= 16 and hasTicket” and print the result for sample values.