Description
Get the lower and upper bound from the user and then print all the Armstrong numbers within that range.
Input
10
1000
Output
153 370 371 407
C Program
#include <stdio.h>
#include<math.h>
int order(int x)
{
int len = 0;
while (x)
{
len++;
x = x/10;
}
return len;
}
void Armstrong(int lower, int upper){
for(int num = lower; num <= upper; num++){
int sum = 0, temp, rem, len;
temp = num;
len = order(num);
while(temp != 0)
{
rem = temp % 10;
sum = sum + pow(rem,len);;
temp = temp/10;
}
if(sum == num)
printf("%d ",num);
}
}
int main ()
{
int lower,upper;
printf("Enter a lower & upper bounds: ");
scanf("%d %d",&lower,&upper);
Armstrong(lower,upper);
}
C++ Program
#include <iostream>
#include<math.h>
using namespace std;
int order(int x)
{
int len = 0;
while (x)
{
len++;
x = x/10;
}
return len;
}
void Armstrong(int lower, int upper){
for(int num = lower; num <= upper; num++){
int sum = 0, temp, rem, len;
temp = num;
len = order(num);
while(temp != 0)
{
rem = temp % 10;
sum = sum + pow(rem,len);;
temp = temp/10;
}
if(sum == num)
cout<<num<<" ";
}
}
int main ()
{
int lower,upper;
cout<<"Enter a lower & upper bounds: ";
cin>>lower>>upper;
Armstrong(lower,upper);
}
Java Program
import java.math.*;
import java.util.Scanner;
class Main {
static void Armstrong(int lower, int upper)
{
for (int i = lower; i < upper; ++i) {
int x = i;
int n = 0;
while (x != 0) {
x /= 10;
++n;
}
int pow_sum = 0;
x = i;
while (x != 0) {
int digit = x % 10;
pow_sum += Math.pow(digit, n);
x /= 10;
}
if (pow_sum == i)
System.out.print(i + " ");
}
}
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
System.out.print("Enter lower bound : ");
int num1 = sc.nextInt();
System.out.print("Enter upper bound : ");
int num2 = sc.nextInt();
Armstrong(num1, num2);
System.out.println();
}
}
Python Program
lower = int(input("Enter lower range: "))
upper = int(input("Enter upper range: "))
for num in range(lower,upper + 1):
sum = 0
temp = num
count=0
while temp!=0:
count=count+1
temp=temp//10
temp=num
while temp > 0:
digit = temp % 10
sum += pow(digit,count)
temp //= 10
if num == sum:
print(num,end=" ")
