isPrime

isPrime.js

let ultimatePrime = number => {

	let sqrt = (Math.floor(Math.sqrt(number)));

	for (let i = 2 ; i <= number/2; i++){

  
		if(number % i === 0) {
  	  return false;
    }
	}
  
	return number > 1;
}

console.log(ultimatePrime(4))

let isPrime2 = number => {

if (number < 2) return false;

	let sqrt = (Math.floor(Math.sqrt(number)));
  
  for (let i = 2; i <= sqrt; i++){
       if (number % i === 0) {
            return false;
        }
  }
  
  return true;
};

console.log(isPrime2(4));

function isPrime(value) {
    for(var i = 2; i < value; i++) {
        if(value % i === 0) {
            return false;
        }
    }
    return value > 1;
}



console.log(isPrime(4));