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Finding next prime number to a given number using JavaScript
Problem
We are required to write a JavaScript function that takes in a number n. Our function should that smallest number which is just greater than n and is a prime number.
Example
Following is the code −
const num = 101; const isPrime = (num) => { let sqrtnum = Math.floor(Math.sqrt(num)); let prime = num !== 1; for(let i = 2; i < sqrtnum + 1; i++){ if(num % i === 0){ prime = false; break; }; }; return prime; } const nextPrime = (num = 1) => { while(!isPrime(++num)){ }; return num; }; console.log(nextPrime(num));
Output
103
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