Question

How to use addition assignment (+=) in JavaScript

Answer 1

let n = 10;
let s = 'java';

console.log(n += 9); // 19
console.log(n += true); // 20
console.log(n += false); // 20
console.log(n += 3); // 23

console.log(s += 'script'); // javascript



/*
run:

19
20
20
23
javascript

*/

 

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