By | 27.12.2016

# Power of a Number using Recursion

Write a C++ Program to find Power of a Number using Recursion. Here’s simple C++ Program to find Power of a Number using Recursion in C++ Programming Language.

## What are Functions ?

Function is a block of statements that performs some operations. All C++ programs have at least one function – function called “main()”. This function is entry-point of your program.

A function declaration tells the compiler about a function’s name, return type, and parameters. A function definition provides the actual body of the function.

## Defining a Function : :

The general form of a C++ function definition is as follows:

return_type Function_Name( list of parameters )
{
//function’s body
}

• return_type : suggests what the function will return. It can be void, int, char, some pointer or even a class object.
• Function_Name : is the name of the function, using the function name it is called.
• Parameters : are variables to hold values of arguments passed while function is called. A function may or may not contain parameter list.
• Function body : is he part where the code statements are written.

Below is the source code for C++ Program to find Power of a Number using Recursion which is successfully compiled and run on Windows System to produce desired output as shown below :

### SOURCE CODE : :

```/* C++ Program to find Power of a Number using Recursion */

#include <iostream>
using namespace std;

int calculatePower(int, int);

int main()
{
int base, powerRaised, result;

cout << "\nEnter base value :: ";
cin >> base;

cout << "\nEnter power of base :: ";
cin >> powerRaised;

result = calculatePower(base, powerRaised);

cout <<"\nThe Power of a Number [ "<< base << "^" << powerRaised << " ] = " << result<<"\n";

return 0;
}

int calculatePower(int base, int powerRaised)
{
if (powerRaised != 0)
return (base*calculatePower(base, powerRaised-1));
else
return 1;
}```

### OUTPUT : :

```/* C++ Program to find Power of a Number using Recursion */

Enter base value :: 2

Enter power of base :: 5

The Power of a Number [ 2^5 ] = 32

Process returned 0```

Above is the source code for C++ Program to find Power of a Number using Recursion which is successfully compiled and run on Windows System.The Output of the program is shown above .

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