Question

Print Armstrong number in an (Array for Java/ List for Python)

A positive number is called armstrong number if  sum of its own digits each raised to the power of the number of digits is equal to number
153
1^3+5^3+3^3=1+125+27=153
153 is an armstrong number

Enter the size of list:10
enter element in given list:
1:30
2:20
3:1
4:153
5:99
6:107
7:19
8:145
9:131
10:3
Elements in given List:
[30, 20, 1, 153, 99, 107, 19, 145, 131, 3]
Armstrong number in given List:
1 153 3

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Code

Java

Python

Java

import java.util.Scanner;
public class ArmstrongNumberInArray
{
    public static void main(String[] args)
    {
        /* Initialize array */
        int [] arr;

        int n=0,i=0,temp=0,c=0,r=0,noOfDigits=0;
        Scanner sc = new Scanner(System.in);

        System.out.println("Enter a number of elements in the array");
        n = sc.nextInt();
        arr=new int[n];
        System.out.println("Enter numbers in array");

        for(i=0;i< n;i++)
        {
            arr[i]=sc.nextInt();
        }
        System.out.println("Elements entered in Given array");

        for(i=0;i< n;i++)
        {
            System.out.print(arr[i]+" ");
        }
        System.out.println();

        /* printing Armstrong elements in an array */
        System.out.println("Armstrong Elements in an array:");
        for(i=0;i< n;i++)
        {
            c=0;
            temp=arr[i];
            noOfDigits=Integer.toString(temp).length();
            while(temp>0)
            {
                r=temp%10;
                temp=temp/10;
                c=c+(int)(Math.pow(r,noOfDigits));
            }
            if(arr[i]==c)
            {
                System.out.print(arr[i]+" ");
            }
        }

    }
}

Python

li=[]
size=int(input("Enter the size of list:"))
print("enter element in given list:")
for i in range(0,size):
    print((i+1),end=":")
    li.append(int(input()))
print("Elements in given List:")
print(li)
print("Armstrong number in given List:")
for element in li:
    totalDigits=len(str(element))
    """
        str(element) converted integer to string
        len() gives length of string
        so len(str(element)) combined gives total number of digits
    """
    sum=0
    temp = element
    while(temp>0):
        digit=temp%10
        sum=sum+digit**totalDigits
        temp=temp//10

    if(sum==element):
        print(element,end=" ")