Question
write a ‘java’ program to check whether given number is Armstrong or not. (Use static keyword)
Solution
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we will solve write a ‘java’ program to check whether given number is Armstrong or not. (Use static keyword)
import java.util.Scanner;
import java.lang.Math;
public class ArmstsrongNumber
{
//function to check if the number is Armstrong or not
static boolean isArmstrong(int n)
{
int temp, digits=0, last=0, sum=0;
//assigning n into a temp variable
temp=n;
//loop execute until the condition becomes false
while(temp>0)
{
temp = temp/10;
digits++;
}
temp = n;
while(temp>0)
{
//determines the last digit from the number
last = temp % 10;
//calculates the power of a number up to digit times and add the resultant to the sum variable
sum += (Math.pow(last, digits));
//removes the last digit
temp = temp/10;
}
//compares the sum with n
if(n==sum)
//returns if sum and n are equal
return true;
//returns false if sum and n are not equal
else return false;
}
//driver code
public static void main(String args[])
{
int num;
Scanner sc= new Scanner(System.in);
System.out.print("Enter the number: ");
//reads the limit from the user
num=sc.nextInt();
if(isArmstrong(num))
{
System.out.print("Armstrong ");
}
else
{
System.out.print("Not Armstrong ");
}
}
}