Go Program to Find Sum of Digits in a Number

Write a Go Program to Find Sum of Digits in a Number using for loop. The for loop condition make sure the number is greater than zero. Within the loop, 

• digiReminder = digiNum % 10 – It adds the last digit of a number to digiReminder.
• digiSum = digiSum + digiReminder -> Adds the last digit to digiSum. 
• digiNum = digiNum / 10 – It removes the last digit from the digiNum.

package main

import "fmt"

func main() {

    var digiNum, digiSum, digiReminder int

    fmt.Print("Enter the Number to find the Sum of Digits = ")
    fmt.Scanln(&digiNum)

    for digiSum = 0; digiNum > 0; digiNum = digiNum / 10 {
        digiReminder = digiNum % 10
        digiSum = digiSum + digiReminder
    }
    fmt.Println("The Sum of Digits in this Number = ", digiSum)
}

Go Program to find the Sum of digits in a number using a function

package main

import "fmt"

var digiSum int

func digitSum(digiNum int) int {
    var digiReminder int

    for digiSum = 0; digiNum > 0; digiNum = digiNum / 10 {
        digiReminder = digiNum % 10
        digiSum = digiSum + digiReminder
    }
    return digiSum
}

func main() {

    var digiNum int

    fmt.Print("Enter the Number to find the Sum of Digits = ")
    fmt.Scanln(&digiNum)

    digiSum = digitSum(digiNum)
    fmt.Println("The Sum of Digits in this Number = ", digiSum)
}

SureshMac:GoExamples suresh$ go run digitSum2.go
Enter the Number to find the Sum of Digits = 4567
The Sum of Digits in this Number =  22
SureshMac:GoExamples suresh$ go run digitSum2.go
Enter the Number to find the Sum of Digits = 98759
The Sum of Digits in this Number =  38

Golang Program to Calculate Sum Digits in a Number using Recursion In this Golang Program to calculate the sum of digits in a Number, we call digitSum(digiNum/10) function recursively.

package main

import "fmt"

var digiSum int

func digitSum(digiNum int) int {
    digiSum = 0
    if digiNum == 0 {
        return 0
    }
    digiSum = digiNum%10 + digitSum(digiNum/10)
    return digiSum
}

func main() {

    var digiNum int

    fmt.Print("Enter the Number to find the Sum of Digits = ")
    fmt.Scanln(&digiNum)

    digiSum = digitSum(digiNum)
    fmt.Println("The Sum of Digits in this Number = ", digiSum)
}

SureshMac:GoExamples suresh$ go run digitSum3.go
Enter the Number to find the Sum of Digits = 45678
The Sum of Digits in this Number =  30
SureshMac:GoExamples suresh$ go run digitSum3.go
Enter the Number to find the Sum of Digits = 8098603
The Sum of Digits in this Number =  34