05 Operators and comparisons

Arithmetic computes a value; comparisons and Boolean operators compute Boolean.

main() {
  Integer price = 8
  Integer quantity = 3
  Integer total = price * quantity + 2

  Boolean affordable = total <= 30
  Boolean available = quantity > 0

  printLine(total)
  printLine(affordable)
  printLine(affordable && available)
}

Output:

26
true
true

Multiplication binds before addition, so the total is 8 * 3 + 2 = 26. <= and > produce Boolean results. && combines two Boolean values and evaluates its right side only when the left side is true.

Try it: Change quantity to 0 and predict all three output lines before running.

Precise rules: Language Reference.