In this post, we will learn how to calculate the power of a number using C++ Programming language.
An expression that represents repeated multiplication of the same factor is called a power. For example: the power of a base ‘5‘ of exponent ‘2‘ is 52 = 5 x 5 = 25.
We will calculate the power of a number using the following approaches:
- Using pow() function
- Using While Loop
So, without further ado, let’s begin this tutorial.
C++ Program to Calculate the Power of a Number
// C++ Program to Calculate the Power of a Number
#include <iostream>
#include <cmath>
using namespace std;
int main(){
float base, exp, power;
// Asking for input
cout << "Enter the base: ";
cin >> base;
cout << "Enter the exponent: ";
cin >> exp;
// Calculating power using pow() function
power = pow(base, exp);
// Displaying output
cout << base << "^" << exp << " = " << power << endl;
return 0;
}
Output
Enter the base: 2
Enter the exponent: 5
2^5 = 32
How Does This Program Work ?
float base, exp, power;
In this program, we have declared three floating data type variables named base, exp and power.
// Asking for input
cout << "Enter the base: ";
cin >> base;
cout << "Enter the exponent: ";
cin >> exp;
Now, the user is asked to enter the base and exponent.
// Calculating power using pow() function
power = pow(base, exp);
The power of the entered number is calculated using the pow() function. The pow() function computes a base number raised to the power of an exponent. This function is located in the cmath header file.
The power of the number gets stored in the power named variable.
// Displaying output
cout << base << "^" << exp << " = " << power << endl;
The power of the entered number is displayed on the screen using the cout statement.
C++ Program to Calculate the Power of a Number Using For Loop
// C++ Program to Calculate the Power of a Number Using For Loop
#include <iostream>
using namespace std;
int main(){
float base, exp, power = 1;
// Asking for input
cout << "Enter the base: ";
cin >> base;
cout << "Enter the exponent: ";
cin >> exp;
// Calculating power
for (int i = 0; i < exp; i++){
power = power * base;
}
// Displaying output
cout << base << "^" << exp << " = " << power << endl;
return 0;
}
Output
Enter the base: 3
Enter the exponent: 3
3^3 = 27
Conclusion
I hope after going through this post, you understand how to calculate the power of a number using C++ Programming language.
If you have any doubt regarding the post, then contact us in the comment section. We will be delighted to assist you.
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