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C program to calculate power of a given number
Take two integers from the user for base and exponent and calculate the power as explained below.
Example
Consider the following for writing a C program.
- Suppose base =3
- Exponent = 4
- Power=3*3*3*3
Algorithm
Follow the algorithm given below −
Step 1: Declare int and long variables. Step 2: Enter base value through console. Step 3: Enter exponent value through console. Step 4: While loop. Exponent !=0 i. Value *=base ii. –exponent Step 5: Print the result.
Example
The following program explains how to calculate power of given number in C language.
#include<stdio.h> int main(){ int base, exponent; long value = 1; printf("Enter a base value:\n "); scanf("%d", &base); printf("Enter an exponent value: "); scanf("%d", &exponent); while (exponent != 0){ value *= base; --exponent; } printf("result = %ld", value); return 0; }
Output
When the above program is executed, it produces the following result −
Run 1: Enter a base value: 5 Enter an exponent value: 4 result = 625 Run 2: Enter a base value: 8 Enter an exponent value: 3 result = 512
Example
If we want to find the power of real numbers, we can use pow function which is a predefined function present in math.h.
#include<math.h> #include<stdio.h> int main() { double base, exponent, value; printf("Enter a base value: "); scanf("%lf", &base); printf("Enter an exponent value: "); scanf("%lf", &exponent); // calculates the power value = pow(base, exponent); printf("%.1lf^%.1lf = %.2lf", base, exponent, value); return 0; }
Output
When the above program is executed, it produces the following result −
Enter a base value: 3.4 Enter an exponent value: 2.3 3.4^2.3 = 16.69
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