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prime number in javascript using for loop

function sumPrimes(num) {
  // Helper function to check primality
  function isPrime(num) {
    for (let i = 2; i <= Math.sqrt(num); i++) {
      if (num % i == 0)
        return false;
    }
    return true;
  }

  // Check all numbers for primality
  let sum = 0;
  for (let i = 2; i <= num; i++) {
    if (isPrime(i))
      sum += i;
  }
  return sum;
}
Source by forum.freecodecamp.org #
 
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Tagged: #prime #number #javascript #loop
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