DEV Community

Rahul Chaudhary

Posted on Nov 19, 2021

Guess the output

#javascript #beginners #opensource #webdev

var a = 2;
if (true) {
var a = 5;
console.log(a) // 5
}
console.log(a) // 5

I'm new to Javascript, can anyone tell why it printed 5 in below console statement

Subscribe

TL;DR If you use var this will happen, try using let

var is not block scoped, this is a limitation from the days of old JavaScript. Nowadays you should use the modern let or const.

Some resources:

You overwrote the variable in the if statement.