Confusion in JavaScript

Question

var a = 13
var b = 20
a=a==b
console.log(a)

Why this code output false and I can't understand a=a==b. Please answer me

Answer 1

Allamprabhu Hiremath because
a=a==b means value assign to a and b is same if it is same then it gives true if it not then false

Answer 2

The "==" is to compare. So you are comparing 13 and 20 it's like you say "is 13 equal to 20?" The answer is false.
At line 3 you are assigning "false" value to the variable "a".
a = is 13 equal to 20?
a = false