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Adding binary without converting in JavaScript
Problem
We are required to write a JavaScript function that takes in two binary strings str1 and str2 as the first and the second argument
Our function should return the sum of the two binary numbers. We are not allowed to convert the binary numbers into decimal and then add and the resulting sum should contain no zeros at all.
For example, if the input to the function is −
Input
const str1 = '1101'; const str2 = '10111';
Output
const output = '100100';
Example
Following is the code −
const str1 = '1101';
const str2 = '10111';
const addBinary = (str1 = '', str2 = '') => {
str1 = str1.split('').reverse();
str2 = str2.split('').reverse();
let res = '', temp = 0;
while (str1.length || str2.length || temp) {
temp += (~~str1.shift()) + (~~str2.shift());
let mod = temp % 2;
res = mod + res;
temp = temp > 1;
};
return (+res) ? res.replace(/^0+/, '') : '0';
};
console.log(addBinary(str1, str2));Output
100100
Updated on: 22-Apr-2021
167 Views
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