# C++ Program to Find Power of a Number

C++ program to find power | In this post, we will develop a C++ program to calculate the power of a number. First, we will develop a program using for loop then we will use the recursion technique, and finally we will use function overloading.

Power of any number b*n given as b*b*…..*b (n-times). Here b is called base and n is called the exponent. Here we will write the C program to find the power of a number.

Example:-

22 = 2*2 = 4
33 = 3*3*3 = 27
53 = 5*5*5 = 125

## C++ Program to Find Power of a Number Using For Loop

``````// C++ program to calculate power of a Number
#include<iostream>
using namespace std;
int main()
{
// declare variables
int base, exponent;
long result=1;

// take input
cout << "Enter base and exponent: ";
cin >> base >> exponent;

// calculate power value
for (int i = exponent; i >= 1; i--)
{
result *= base;
}

// display result
cout << "Result = " << result << endl;

return 0;
}``````

Output:-

Enter base and exponent: 5 4
Result = 625

## Using pow() Function

We can also use pow() function to calculate the power of a number in C++.

``````// C++ program to calculate power of a Number
#include<iostream>
#include
using namespace std;
int main()
{
// declare variables
int base, exponent;
long result;

// take input
cout << "Enter base and exponent: ";
cin >> base >> exponent;

// calculate power value
result = pow(base, exponent);

// display result
cout << "Result = " << result << endl;

return 0;
}``````

## C++ Program to Find Power of a Number Using Recursion

We can also use recursion technique to calculate the power of a number. In recursion technique, we are defining a recursive function.

A technique of defining the method/function that contains a call to itself is called the recursion.  The recursive function/method allows us to divide the complex problem into identical single simple cases that can be handled easily. This is also a well-known computer programming technique: divide and conquer.

``````#include<iostream>
#include
using namespace std;

// function declaration
long power(int, int);

// main function
int main()
{
// declare variables
int base, exponent;
long result;

// take input
cout << "Enter base and exponent: ";
cin >> base >> exponent;

// calculate power value
result = power(base, exponent);

// display result
cout << "Result = " << result << endl;

return 0;
}

// function to calculate power
long power(int a, int b)
{
if(b==0)
return 1; //base case
else
return a * power(a, --b); //general case
}``````

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