Question

How to check if a number is armstrong number or not in Go

Answer 1

// An Armstrong number of three digits is an integer that the sum
// of the cubes of its digits is equal to the number itself

// 371 is an Armstrong number: 3**3 + 7**3 + 1**3 = 371

package main

import (
	"fmt"
)

func IsArmstrongNumber(n int) bool {
	reminder, sum := 0, 0
	tmp := n

	for n != 0 {
		reminder = n % 10
		n = n / 10
		sum += reminder * reminder * reminder
	}

	return sum == tmp
}

func main() {
	n := 371

	if IsArmstrongNumber(n) {
		fmt.Printf("%d is an Armstrong number\n", n)
	} else {
		fmt.Printf("%d is not an Armstrong number\n", n)
	}
}



/*
run:

371 is an Armstrong number

*/

 

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