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igolopolosov/increment-and-decrement.js

Created August 7, 2018 13:01
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Explanation of behaviour around increment and decrement
Raw
increment-and-decrement.js
// increment
var i = 1;
console.log(i++ + ++i); // 4
var i = 1;
console.log(i++ + i++); // 3
var i = 1;
console.log(++i + i++); // 4
var i = 1;
console.log(++i + ++i); // 5
// decrement
var i = 1;
console.log(i-- - --i); // 2
var i = 1;
console.log(i-- - i--); // 1
var i = 1;
console.log(--i - i--); // 0
var i = 1;
console.log(--i - --i); // 1
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