# Pronic numbers in JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

#### JavaScript for beginners

Best Seller

74 Lectures 10 hours

#### Modern Javascript for Beginners + Javascript Projects

Most Popular

112 Lectures 15 hours

#### The Complete Full-Stack JavaScript Course!

Best Seller

96 Lectures 24 hours

A Pronic number is a number which is the product of two consecutive integers, that is, a number of the form n(n + 1).

We are required to write a JavaScript function that takes in a number and returns true if it is a Pronic number otherwise returns false

Let’s write the code for this function −

## Example

const num = 90;
const isPronic = num => {
let nearestSqrt = Math.floor(Math.sqrt(num)) - 1;
while(nearestSqrt * (nearestSqrt + 1) <= num){
if(nearestSqrt * (nearestSqrt+1) === num ){
return true;
};
nearestSqrt++;
};
return false;
};
console.log(isPronic(num));

## Output

Following is the output in the console −

true
Updated on 14-Sep-2020 14:05:35