number is prime or not javascript
function isPrime(num) {
for(var i = 2; i < num; i++)
if(num % i === 0) return false;
return num > 1;
}number is prime or not javascript
function isPrime(num) {
for(var i = 2; i < num; i++)
if(num % i === 0) return false;
return num > 1;
}Javascript prime number check
// 6k+-1 optimisation
function is_prime (n) {
if (n < 3) return n > 1;
else if (n % 2 === 0 || n % 3 === 0) return false;
else if (n < 25) return true;
let i = 5;
while (i * i <= n ) {
if (n % i === 0 || n % (i + 2) === 0) return false;
i += 6;
}
return true;
}Copyright © 2021 Codeinu
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