Here is a Java program to check the number is Armstrong number or not. An Armstrong number, also known as narcissistic number, is a number that is equal to the sum of the cubes of its own digits.
For example, 153 is an Armstrong number since 153 = 1*1*1 + 7*7*7 + 0*0*0.
Source Code:
//java program to check Armstrong number
import java.util.Scanner;
public class Armstrong {
public static void main(String args[]) {
int aNum = 0, r, num, cNum;
Scanner sc = new Scanner(System.in);
System.out.print("Enter no. to check:");
num = sc.nextInt();
cNum = num;
do {
r = cNum % 10;
cNum = cNum / 10;
aNum = aNum + r*r*r;
}while(cNum!=0);
if(num == aNum) {
System.out.println("Entered number is Armstrong number.");
}
else {
System.out.println("Entered number is not Armstrong number.");
}
}
}Input & Output:
Enter no. to check:22
Entered number is not Armstrong number.
OR
Enter no. to check:153
Entered number is Armstrong number.