CODE EXAMPLE FOR JAVASCRIPT

javascript prime number checker program

function prime_checker(num){
    let is_prime;
    if (num===1){is_prime = false}
    else if (num===2||num===3){is_prime = true}
    else if (num%2===0){is_prime = false}
    else{
        let x = Math.floor(num/2);
        while (x>1){
            if (num%x===0){
                is_prime = false;
                break;
            }
            x = x-1;
            is_prime = true;
        }
    }
    
    return is_prime
}