In this tutorial, we are going to learn a writing program in C to calculate the power of a given number without using the POW method. Here we will write our own logic to calculate the power of a given number.
To calculate the power we need two numbers. One is the base number and another is an exponent which is known as power. The base is the number for which we are calculating power and power is the number that tells what power we have to calculate.
Let’s see this with an example
We have base number 4 and the exponent is 3.
It means we have to calculate the power of 4, 3 times.
We can write this as 4^3 = 4*4*4 = 64.
How our program will behave?
- Our program will take two integers as an input. One is base and another is power.
- Now to calcualte the power without using any existing library method, we will multiple base number to itself for power times.
- Calculation of power means calculating same number to itself for the times given in power.
- Suppose in input base is given as 6 and power is given as 3. We will calculate 6 to itself for 3 times like 6 * 6 * 6.
- After calculating the power our program will return the result as an output.
Program in C to Calculate power without using pow function
#include <stdio.h>
int main() {
int base, exp , result=1;
printf("Enter a value of base: ");
scanf("%d", &base);
printf("Enter a value of exponent: ");
scanf("%d", &exp);
printf("%d to the power %d is = ", base, exp);
while (exp != 0) {
result = base * result;
--exp;
}
printf("%d",result);
return 0;
}Output
Enter a value of base: 4
Enter a value of exponent: 3
4 to the power 3 is = 64[wpusb]