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← Problems

Multiples of 3 and 5

1 min  

over 1 year ago

 30/04/2019 

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000.

package main

import "fmt"

func main() {
  sum := 0
  for i := 0; i < 1000; i++ {
    if i % 3 == 0 || i % 5 == 0 {
      sum += i
    }
  }
  fmt.Print(sum)
}

Answer: 233168