# Write a program to calculate pow(x,n) in C++

C++Server Side ProgrammingProgramming

In this problem, we are given two integers x and n. Our task is to write a program to calculate the pow(x,n).

Let’s take an example to understand the problem,

## Input

x = 5 , n = 3

## Output

125

Program to calculate the pow(x,n),

## Example

Live Demo

#include <iostream>
using namespace std;
float myPow(float x, int y) {
if(y == 0)
return 1;
float temp = myPow(x, y / 2);
if (y % 2 == 0)
return temp*temp;
else {
if(y > 0)
return x*temp*temp;
else
return (temp*temp)/x;
}
}
int main() {
float x = 5;
int n = 7;
cout<<x<<" raised to the power "<<n<<" is "<<myPow(x, n);
return 0;
}

## Output

5 raised to the power 7 is 78125

The program shows an efficient approach by dividing the power into half and then multipling the two half and also considers the negative cases.

Updated on 20-Apr-2020 11:22:37