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javascript · level 1 · unit 4 · lesson 1

  1. meet it
  2. guess first
  3. your turn
  4. fix it
  5. nailed it

Tap a green word if you get lost.

meet it

An if runs code only when its is true.

Picture a fork in the path with a sign: Is it Saturday? An if asks a condition like that, inside round brackets. If the answer is yes, JavaScript runs the lines inside. If not, it walks straight past.

Every condition gives true or false. A value that can only be one of these two is a . To ask whether two values match, use three equals signs, ===. One = puts a value in a box.

The lines that belong to the if sit inside curly brackets { }, called a . Indent each line inside by two spaces, so people can see where it belongs.

let day = "Saturday";
console.log(day === "Saturday");
if (day === "Saturday") {
  console.log("Pancakes for breakfast!");
}
console.log("Time to get dressed.");

Lines after the closing } sit outside the if, so they run every time.