Why the code returns this.

Question

var a = 5;
a = a - a % 2
console.log(a) //4
Why this code returns 6 instead of 0

Answer 1

when operators have same precedence, computation is done from left to right... but when one has higher precedence, it will be computed before ^^

to be aware of different operator precedence in JS, you could refer to this link:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence

Answer 2

visph thanks again, you are genius