Q:

Golang program to check the given number is an Armstrong number or not using goto statement

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mahmoud2506
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2022-05-27
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In this program, we will read an integer number and then check the given number is an Armstrong number or not?

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mahmoud2506
2022-05-27
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Program/Source Code:

The source code to check the given number is an Armstrong number or not using the goto statement is given below. The given program is compiled and executed successfully.

// Golang program to check the given number is an
// Armstrong number or not using the goto statement

package main

import "fmt"

func main() {
	var num int = 0
	var rem int = 0
	var res int = 0
	var temp int = 0

	fmt.Print("Enter Number: ")
	fmt.Scanf("%d", &num)

	temp = num
MyLbl:

	rem = num % 10
	res = res + (rem * rem * rem)
	num = num / 10

	if num > 0 {
		goto MyLbl
	}

	if temp == res {
		fmt.Printf("Number is armstrong")
	} else {
		fmt.Printf("Number is not armstrong")
	}
}

Output:

RUN 1:
Enter Number: 153
Number is armstrong

RUN 2:
Enter Number: 563
Number is not armstrong

Explanation:

Here, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt package that includes the files of package fmt then we can use a function related to the fmt package.

In the main() function, we created four variables num, rev, rem, temp that are initialized with 0 and also created a label MyLbl.

MyLbl:
    rem = num % 10
    res = res + (rem*rem*rem)
    num = num / 10
        
    if(num>0){
        goto MyLbl
    }
        
    if(temp==res){
        fmt.Printf("Number is armstrong")
    }else{
            fmt.Printf("Number is not armstrong")
    }

In the above code, we calculated the sum of the cube of each digit of the given number to check the given number is Armstrong or not. After that, we printed the appropriate message on the console screen.

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