Question

What is the algorithm to find the sum of prime numbers in the input in python?

Answer 1

To find the sum of prime numbers in a given list of numbers, follow this algorithm:

1. Initialize a sum variable to 0 to keep track of the sum of prime numbers.
2. For each number in the input list, perform the following steps:
   • Check if the number is greater than 1, because prime numbers are greater than 1.
   • Check if the number is prime by trying to divide it by all smaller numbers from 2 up to its square root. If it is divisible by any such number, it is not prime.
     • Start a loop from 2 to the square root of the number.
     • If the current number is divisible by any of these numbers, it's not a prime number. Break the loop and consider the next number in the list.
   • If the number is prime (i.e., it passes the above check), add it to the sum.
3. After checking all numbers, return or output the sum of the prime numbers.