Increment and Decrement

Increment (++) and decrement (--) operators are commonly used to increase or decrease a variable's value by 1. They are especially useful in loops for managing counters.

Increment Operators

Pre-increment (++variable): increases the value before usage;
Post-increment (variable++): increases the value after usage.

Usage in a loop:

main


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void main() {
  for (int i = 0; i < 5; ++i) {
    print(i); // Outputs: 0, 1, 2, 3, 4
  }
}

Decrement Operators

Pre-decrement (--variable): decreases the value before usage.
Post-decrement (variable--): decreases the value after usage.

Usage in a loop:

main


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void main() {
  for (int i = 5; i > 0; --i) {
    print(i); // Outputs: 5, 4, 3, 2, 1
  }
}

Task

Complete the code so that it prints all even numbers from 2 to 10 inclusive.

main


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void main() {
  for (int i = 2; i <= 10; ___) {
    print(i);
  }
}

Use an increment operator.

main


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void main() {
  for (int i = 2; i <= 10; i += 2) {
    print(i);
  }
}

War alles klar?

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Abschnitt 5. Kapitel 5