Write a function to check if a number is prime or not. A number is prime if it has only two distinct divisors: 1 and itself. For example, 3 is a prime number because it has only two distinct divisors: 1 and 3. Return "Prime" if num is prime; otherwise, return …

function isPrime(number) { if((number % 2 === 0 && number !== 2) || number <= 1) { return false; } const limit = Math.floor(Math.sqrt(number)); for(let index = 3; index <= limit; index += 2) { if (number % index === 0) { return false; } } return true; }

Feb 19, 2024 · In this article, we'll explore how to create a JavaScript program to print all prime numbers from 1 to a given number N. To find prime numbers from 1 to N, we need to: Iterate through all numbers from 2 to N (since 1 is not a prime number). For each number, check if it is divisible by any number other than 1 and itself.

Jan 24, 2024 · The program then checks if the entered number is prime using the isPrime function. Depending on the result, it prints either “[number] is a prime number.” or “[number] is not a prime number.”, with [number] being the user-entered number.

Jun 8, 2023 · In this post, I will show you how to check if a number is prime or not in JavaScript with examples. Method 1: By using a for loop: This is the simplest way to find a prime number.

6 days ago · To check if a number is prime, you can use different methods, such as checking divisibility up to the square root for efficiency or using the Sieve of Eratosthenes for multiple numbers. The optimized square root method is usually the …

Aug 28, 2024 · In this article, we'll explore how to create a JavaScript program to print all prime numbers from 1 to a given number N. To find prime numbers from 1 to N, we need to: Iterate through all numbers 3 min read

This JavaScript program demonstrates how to check whether a number is prime by checking divisibility. The algorithm efficiently reduces the number of checks by only testing up to the square root of the number, making it faster for larger numbers.

if (total % l == 0) {prime = "this is not a prime number"} else {prime = "this is a prime number"} the code is used in a html file as part of a function. You need to break out of the loop as soon as you discover the number isn't prime.

Feb 28, 2025 · Write a JavaScript function that checks if a number is prime using recursion without employing any loops. Write a JavaScript function that recursively tests for factors and returns a boolean indicating whether the number is prime.