If statements

Games are full of decisions: did the player win? is health zero? did we hit something? An if statement runs a block of code only when something is true — that’s how your game reacts.

1. if

Put a true/false test in the parentheses. The block runs only if the test is true:

let score = 7;

function draw() {
  cls(1);
  if (score > 5) {
    print('You win!', 8, 8, 11);
  }
}

Change score to 3 and save — the message disappears, because 3 > 5 is false and the block is skipped.

2. else

else gives you the other path — it runs when the if test is false, so exactly one of the two blocks always runs:

let score = 3;

function draw() {
  cls(1);
  if (score > 5) {
    print('You win!', 8, 8, 11);
  } else {
    print('Try again', 8, 8, 8);
  }
}

3. else if

For more than two paths, chain else if. JavaScript checks each test in order and runs the first one that’s true:

let health = 20;

function draw() {
  cls(1);
  if (health > 60) {
    print('Healthy', 8, 8, 11);
  } else if (health > 25) {
    print('Careful', 8, 8, 10);
  } else {
    print('Danger!', 8, 8, 8);
  }
}

The tests inside the parentheses are the comparisons from Booleans (>, <, ===, …), and you can join them with && and || for trickier conditions.

What you learned

• if (test) { … } runs its block only when test is true.
• else runs when the if was false; exactly one block runs.
• else if chains more paths — the first true one wins.
• The test is a boolean (a comparison); compare with ===, not =.