 JavaScript: Check a number is prime or not

JavaScript Function: Exercise-8 with Solution

Write a JavaScript function that accepts a number as a parameter and check the number is prime or not.

Note : A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Pictorial Presentation: Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<meta charset=utf-8 />
<title>Check a number is prime or not</title>
<body>

</body>
</html>

JavaScript Code:

function test_prime(n)
{

if (n===1)
{
return false;
}
else if(n === 2)
{
return true;
}else
{
for(var x = 2; x < n; x++)
{
if(n % x === 0)
{
return false;
}
}
return true;
}
}

console.log(test_prime(37));

Sample Output:

true

Flowchart: Live Demo:

See the Pen JavaScript -Counts the number of vowels within a string-function-ex- 7 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus

What is the difficulty level of this exercise?

﻿