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Copy pathArmstrongNumber.java
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50 lines (44 loc) · 1.25 KB
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import java.util.Scanner;
public class ArmstrongNumber {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("welcome to armstrong number");
System.out.println("please enter your number:");
int num = input.nextInt();
boolean isArmstrong = isArmstrong(num);
if(isArmstrong) {
System.out.println("your number is armstrong");
}
else {
System.out.println("your number is not armstrong");
}
}
public static boolean isArmstrong(int num) {
int noOfDigits = noOfDigits(num);
int numCopy = num;
int finalNumber = 0;
while (num > 0) {
int lastDigit = num % 10;
num /= 10;
finalNumber += pow(lastDigit, noOfDigits);
}
return finalNumber == numCopy;
}
public static int pow(int num1, int num2) {
int result = 1;
int i = 0;
while (i < num2) {
result *= num1;
i++;
}
return result;
}
public static int noOfDigits(int num) {
int digits = 0;
while (num > 0) {
digits++;
num /= 10;
}
return digits;
}
}