Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Finding square root of a number without using Math.sqrt() in JavaScript
We are required to write a JavaScript function that takes in a positive integer as the only argument. The function should find and return the square root of the number provided as the input.
Example
Following is the code −
const squareRoot = (num, precision = 0) => {
if (num <= 0) {
return 0;
};
let res = 1;
const deviation = 1 / (10 ** precision);
while (Math.abs(num - (res ** 2)) > deviation) {
res -= ((res ** 2) - num) / (2 * res);
};
return Math.round(res * (10 ** precision)) / (10 ** precision);
};
console.log(squareRoot(16));
console.log(squareRoot(161, 3));
console.log(squareRoot(1611, 4));Output
Following is the output on console −
4 12.689 40.1373
Updated on: 11-Dec-2020
605 Views
Advertisements