Confusion with JavaScript increment (++)

Asked Aug 16 '21 at 22:12

Active Aug 16 '21 at 22:15

Viewed 24 times

I'm learning JavaScript and just came across something I'm not understanding.

let x = 3;
const y = x++;

console.log(x);

The console logs 4. Why is x logged as 4, when y is a separate variable and seemingly not affecting x? Is x++ not simply being assigned to y? And in that case, why would the value of x be changed?

edited Aug 16 '21 at 22:15

j08691

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asked Aug 16 '21 at 22:12

Espskully

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`++` always increments the variable it operates on. – VLAZ Aug 16 '21 at 22:13
1

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Increment. "The increment operator (++) increments (adds one to) its operand and returns a value. " – j08691 Aug 16 '21 at 22:14
Related question, what do you think logging `y` will return? – j08691 Aug 16 '21 at 22:16
I see that it logs 3 - which I don't understand either. – Espskully Aug 16 '21 at 22:19
Read the link I posted and it should make sense – j08691 Aug 16 '21 at 22:19

Confusion with JavaScript increment (++)

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