Question

How to sum all the prime numbers in an array with Go

Answer 1

package main

import (
	"fmt"
	"math"
)

func isPrime(n int) int {
	if n == 0 || n == 1 {
		return 0
	}

	for i := 2; i <= int(math.Sqrt(float64(n))); i++ {
		if n%i == 0 {
			return 0
		}
	}

	return 1
}

func main() {
	arr := []int{9, 8, 17, 5, 19, 22, 21, 13, 38, 500, 99}
	sumprime := 0

	for _, value := range arr {
		if isPrime(value) == 1 { // 19 17 5 13
			sumprime += value
		}
	}

	fmt.Println(sumprime)
}


/*
run:

54

*/

 

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