Question

How to use left shift (<<) operator in JavaScript

Answer 1

const a = 1;         // 00000000000000000000000000000001
const b = 2;         // 00000000000000000000000000000010

console.log(a << b); // 00000000000000000000000000000100
 
 
 
/*
run:
 
4
 
*/

 

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Answer 2

const a = 8;         // 00000000000000000000000000000101
const b = 3;         // 00000000000000000000000000000011

console.log(a << b); // 00000000000000000000000001000000
 
 // 8 << 3 = 8 * (2 ** 3) = 8 * (8) = 64
 
/*
run:
 
64
 
*/

 

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