**In this article, you will learn to compute power to a number manually, and by using pow() function.**

**In this article, you will learn to compute power to a number manually, and by using pow() function.**

To understand this example, you should have the knowledge of following C++ programming topics:

- C++ while and do…while Loop

This program takes two numbers from the user (a base number and an exponent) and calculates the power.

Power of a number = base^{exponent}

### Example 1: Compute Power Manually

using namespace std; int main() { int exponent; float base, result = 1; cout << "Enter base and exponent respectively: "; cin >> base >> exponent; cout << base << "^" << exponent << " = "; while (exponent != 0) { result *= base; --exponent; } cout << result; return 0; }

**Output**

Enter base and exponent respectively: 3.4 5 3.4^5 = 454.354

The above technique works only if the exponent is a positive integer.

If you need to find the power of a number with any real number as an exponent, you can use `pow()`

function.

## Example 2: Compute power using pow() Function

#include <iostream> #include <cmath> using namespace std; int main() { float base, exponent, result; cout << "Enter base and exponent respectively: "; cin >> base >> exponent; result = pow(base, exponent); cout << base << "^" << exponent << " = " << result; return 0; }

**Output**

Enter base and exponent respectively: 2.3 4.5 2.3^4.5 = 42.

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