C++ Program to Display Armstrong Number Between Two Numbers

In this tutorial you will learn about the C++ Program to Display Armstrong Number Between Two Numbers and its application with practical example.

In this tutorial, we will learn to create a C++ program that will Display Armstrong Number Between Two Numbers in C++ programming.

Table Of Contents−

C++ Program to Display Armstrong Number Between Two Numbers

Prerequisites.

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.

Basic Input and Output function in C++ Programming.
Basic C++ programming.
While loop in C++ programming.

Program to Display Armstrong Number Between Two Numbers:-

In today’s tutorial, we will create a program that will find the Armstrong numbers between the given number range. First will take the number frame from the user and then will find the Armstrong Number.

With the help of this program, we can Display Armstrong Number Between Two Numbers.

Algorithm:-

1. Declare the variables for the program.

2. Taking the input numbers from and to by the user.

3. Calculating the <strong>Armstrong Numbers</strong>.  

4. Print the Result.

5. End the program.

1. Declare the variables for the program.

2. Taking the input numbers from and to by the user.

3. Calculating the <strong>Armstrong Numbers</strong>.

4. Print the Result.

5. End the program.

Program to Display Armstrong Number Between Two Numbers:-

#include <iostream>
using namespace std;

int main()
{
  //Decalring the variables for the program
  int num1, num2, i, num, digit, sum;
  
  //Taking input number first for the starting range
  cout << "Enter first number: ";
  cin >> num1;
  //Taking input number second for the ending range
  cout << "Enter second number: ";
  cin >> num2;

  //Finfing the Armstrong numbers in the input range
  cout << "Armstrong numbers between " << num1 << " and " << num2 << " are: " << endl;
  for(i = num1; i <= num2; i++)
  {
        sum = 0;
        num = i;

        for(; num > 0; num /= 10)
        {
            digit = num % 10;
            sum = sum + digit * digit * digit;
        }

        if(sum == i)
        {
            //printing the Armstrong numbers
            cout << i << endl;
        }
  }

  return 0;
}

#include <iostream>

using namespace std;

int main()

{

//Decalring the variables for the program

int num1, num2, i, num, digit, sum;

//Taking input number first for the starting range

cout << "Enter first number: ";

cin >> num1;

//Taking input number second for the ending range

cout << "Enter second number: ";

cin >> num2;

//Finfing the Armstrong numbers in the input range

cout << "Armstrong numbers between " << num1 << " and " << num2 << " are: " << endl;

for(i = num1; i <= num2; i++)

{

sum = 0;

num = i;

for(; num > 0; num /= 10)

{

digit = num % 10;

sum = sum + digit * digit * digit;

}

if(sum == i)

{

//printing the Armstrong numbers

cout << i << endl;

}

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

num1 = it will hold the integer value.

num2 = it will hold the integer value.
flag = it will hold the integer value.
digit = it will hold the integer value.

num = it will hold the integer value.
sum = it will hold the integer value.
i = it will hold the integer value.

Taking the input integer number interval from the user.

Calculating the Armstrong numbers.

Printing the output numbers.

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C++ Program to Display Armstrong Number Between Two Numbers