Find Prime Numbers

findPrimes.ts

const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];

const isPrime = (num: number) => {
  const sqRoot = Math.floor(Math.sqrt(num));
  let prime = num != 1;
  for (let i = 2; i < sqRoot + 1; i++) {
    if (num % i == 0) {
      prime = false;
      break;
    }
  }
  return prime;
};

const result = numbers.filter((cr) => isPrime(cr));
console.log(result);