Go Language - Program to Check Krishnamurthy Number
Hello everyone, today we will create a Go program to check if the given number is an Krishnamurthy number or not.
Krishnamurthy number is also referred to as a Strong number.
A number is said to be Krishnamurthy if the factorial sum of all its digits is equal to that number.
For example,
Number = 40585
= 4! + 0! + 5! + 8! + 5!
= 1 * 2 * 3 * 4 + 1 + 1 * 2 * 3 * 4 * 5 + 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 + 1 * 2 * 3 * 4 * 5
= 24 + 1 + 120 + 40320 + 120
= 40585
Example 1: Go program that checks if the given number is a Krishnamurthy number or not.
/*Go program to check whether the given
* number is a Krishnamurthy number or not.
*/
package main
import "fmt"
// Main function
func main() {
//sample 1
number1 := 40585
KrishnamurthyNumber(number1)
//sample 2
number2 := 13789
KrishnamurthyNumber(number2)
//sample 3
number3 := 1009
KrishnamurthyNumber(number3)
}
func KrishnamurthyNumber(number int) {
//initialize sum to 0
sum := 0
//create a copy of the number
tempNumber := number
//perform operation until tempNumber will not equal to 0
for tempNumber != 0 {
/* calculate the factorial of the last digit
of the tempNumber and then add it to the sum
*/
sum = sum + Factorial(tempNumber%10)
// replace the value of tempNumber by tempNumber/10
tempNumber = tempNumber / 10
}
//If sum == number equal, number is krishnamurthy number
if sum == number {
fmt.Println(number, "is Krishnamurthy Number")
} else {
fmt.Println(number, "is not a Krishnamurthy Number")
}
}
//Method to calculate the factorial of the number
func Factorial(number int) int {
fact := 1
for i := 1; i <= number; i++ {
fact *= i
}
return fact
}
Output:
Example 2: Go program that checks if the number from the standard input is a Krishnamurthy number or not.
/*Go program to check whether the number from the standard input
* is a Krishnamurthy number or not.
*/
package main
import "fmt"
// Main function
func main() {
var number int
fmt.Println("Enter an integer value : ")
_, err := fmt.Scanf("%d", &number)
if err != nil {
fmt.Println(err)
}
KrishnamurthyNumber(number)
}
func KrishnamurthyNumber(number int) {
//initialize sum to 0
sum := 0
//create a copy of the number
tempNumber := number
//perform operation until tempNumber will not equal to 0
for tempNumber != 0 {
/* calculate the factorial of the last digit
of the tempNumber and then add it to the sum
*/
sum = sum + Factorial(tempNumber%10)
// replace the value of tempNumber by tempNumber/10
tempNumber = tempNumber / 10
}
//If sum == number equal, number is krishnamurthy number
if sum == number {
fmt.Println(number, "is Krishnamurthy Number")
} else {
fmt.Println(number, "is not a Krishnamurthy Number")
}
}
//Method to calculate the factorial of the number
func Factorial(number int) int {
fact := 1
for i := 1; i <= number; i++ {
fact *= i
}
return fact
}
Output:
