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C program to Find the Power of a Number
How to calculate the power of a number in C programming?
A power of a number tells us how many times the number needs to be multiplied with itself. There are various ways to write a C program to Find the Power of a Number, using loops or pre defined functions in C. For calculating you need to have the base and exponent.
Syntax:
while (exp != 0)
{
result *= base;
--exp;
}
Syntax:
double pow(double num1, double num2);
- num1 – it is the base value.
- num2 – it is the exponential or power value.
Steps to calculate the power of a number number:
- Step 1: Start
- Step 2: Declare the variable num, num2, res.
- Step 3: Read input num1 and num2 from the user or predefine it according to the need.
- Step 4: Use the appropriate syntax that you need.
- Step5: Display the result in the stdout console.
- Step 6: Program end.
Working:
Example 1 :
A simple program where we will find the power of a number that is predefined.
#include<stdio.h>
int main()
{
int num1=5, num2=5;
long double result = 1.0;
while (num2 != 0)
{
result *= num1;
--num2;
}
printf("Answer = %.0Lf", result);
return 0;
}
Output:
Answer = 3125
Example 2 :
Program where we will calculate the power of a numbers given by the users.
#include<stdio.h>
int main()
{
int num1, num2;
long double result = 1.0;
printf("Enter a base number: ");
scanf("%d", &num1);
printf("Enter an exponent: ");
scanf("%d", &num2);
while (num2 != 0)
{
result *= num1;
--num2;
}
printf("Answer = %.0Lf", result);
return 0;
}
Input:
Enter a base number: 5 Enter an exponent: 4
Output:
Answer = 625
Example 3 :
Program where we will find the power of a number in C language using pre-functions available in “math.h” library.
#include<math.h>
#include<stdio.h>
int main()
{
double num1, num2, result;
printf("Enter a base number: ");
scanf("%lf", &num1);
printf("Enter an exponent: ");
scanf("%lf", &num2);
// calculates the power
result = pow(num1, num2);
printf("%.1lf^%.1lf = %.2lf", num1, num2, result);
return 0;
}
Input:
Enter a base number: 4 Enter an exponent: 6
Output:
4.0^6.0 = 4096.00
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