Do you know what will be the output of this code? var y = 1; if (true) { var y = 2; } console.log(y);

Does var have block scope in JavaScript?

Do you know what will be the output of this code?

JavaScript

var y = 1;
if (true) {
  var y = 2;
}
console.log(y);

Show answer and explanation

The answer is 2.

var is function-scoped, not block-scoped. Both declarations refer to the same variable, so the assignment inside the if changes it.