JS-038
JavaScript diagram about Logical AND &&: a visual example of Both conditions must be true
Beginner4 min~4 min read#logical-and#and#logic

Logical AND &&

Both conditions must be true

Goal

Learn to use the && operator to check multiple conditions at the same time.

Explanation

  • The && operator means logical AND.
  • It returns true only when both sides are true.
  • If at least one side is false, the result is false.
  • && is often used in checks where several conditions must be met at the same time.
  • This operator is very important for if statements and program logic.

Analogy

Imagine a door with two requirements: you need a key and permission. If you have only one of them, the door will not open.

Code

console.log(true && true);
console.log(true && false);
console.log(false && true);
console.log(false && false);

Result: true false false false

Common mistake

Beginners sometimes expect true when at least one condition is true. But with &&, every condition must be true.

Remember

  • ✦ && returns true only if both sides are true.
  • ✦ If one side is false, the result is false.
  • ✦ && is used for multiple required conditions.

Quick Quiz

What does true && false return?

Resources