C Program to Find Power of a Number using For | While | Function | Recursion | pow()

C program to find power of a number using for loop, while loop, function, recursion, pow function, and without using pow function.

In this article, you will learn how to make the C program to find power of a number using for loop, while loop, function, recursion, pow function, and without using pow function.

 

Example

 

You should have knowledge of the following topics in C programming to understand these programs:

• C main() function
• C printf() function
• C for loop statement
• C while loop statement
• C Functions
• C Recursion

 

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C Program to Find Power of a Number using For loop

1. Create two variables named b and x with an integer data type and one variable named r with the long integer data type.
2. Assign input values in this b and x.
3. Iterate the base value by using for loop to make multiplication of the base value with itself N times.
4. Print the final output of the program by using the r variable.

 

// C Program to Find Power of a Number using For loop
#include <stdio.h>

// It's the driver function
int main() {
    int b, x, i;
    long long r = 1;
    // b - Base value, x - Exponent value, r - Result value
    
    printf("INPUT Base Number:: ");
    scanf("%d", &b);

    printf("\nINPUT Exponent Number:: ");
    scanf("%d", &x);

    // It will calculate the power of base number
    for (i = x; i > 0; i--) {
        r *= b;
    }

    // It will print the final output
    printf("\n\nOUTPUT:: %d^%d = %lld\n", b, x, r);
    return 0;
}

Run

Output

 

Explanation

In this given program, we have taken the inputs base value 3 and exponent value 4 from the user via the system console. After that, we pass the multiplication of the base with itself 4 times by using the for loop statement.

After the whole process, this will return the 81 the output of the given program.

 

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C Program to Find Power of a Number using While loop

1. Create two variables named b and x with an integer data type and one variable named r with the long integer data type.
2. Assign input values in this b and x.
3. Iterate the base value by using while loop to make multiplication of the base value with itself N times.
4. Print the final output of the program by using the r variable.

 

// C Program to Find Power of a Number using While loop
#include <stdio.h>

// It's the driver function
int main() {
    int b, x;
    long long r = 1;
    // b - Base value, x - Exponent value, r - Result value
    
    printf("INPUT Base Number:: ");
    scanf("%d", &b);

    printf("\nINPUT Exponent Number:: ");
    scanf("%d", &x);

    // It will calculate the power of the base number
    while (x--) {
        r *= b;
    }

    // It will print the final output
    printf("\n\nOUTPUT:: %d^%d = %lld\n", b, x, r);
    return 0;
}

Run

 

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C Program to Find Power of a Number using Function

1. Create two variables named b and x with an integer data type.
2. Assign input values in this b and x.
3. Create a function named FindPow() with two arguments base value and exponent value.
4. Iterate the base value by using while loop to make a multiplication of the base value with itself N times inside of the program.
5. Return the output value at end of this function.
6. Call this function at end of the main program to print the final output of the program.

 

// C Program to Find Power of a Number using Function
#include <stdio.h>
// It will calculate the power of the base number
long long FindPow(int b, int e) {
    long long r=1;
    while (e--) {
        r *= b;
    }
    return r;
}

// It's the driver function
int main() {
    int b, x; // b - Base value, x - Exponent value
    
    printf("INPUT Base Number:: ");
    scanf("%d", &b);

    printf("\nINPUT Exponent Number:: ");
    scanf("%d", &x);

    // It will print the final output
    printf("\n\nOUTPUT:: %d^%d = %lld\n", b, x, FindPow(b, x));
    return 0;
}

Run

Output

 

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C Program to Find Power of a Number using Recursion

1. Create two variables named b and x with an integer data type.
2. Assign input values in this b and x.
3. Create a recursive function named FindPow() with three arguments base value, exponent value, and result value.
4. Call the recursive function inside of this to make a multiplication of base value with itself N times.
5. Return the output value at end of the recursive function.
6. Call this recursive function at end of the main program to print the final output of the program.

 

// C Program to Find Power of a Number using Recursion
#include <stdio.h>
// This recursion function will calculate the power of the base number
long long FindPow(int b, int e, long long r) {
    if (e > 0) {
        e--;
        r *= b;
        FindPow(b, e, r);
    } else
        return r;
}

// It's the driver function
int main() {
    int b, x; // b - Base value, x - Exponent value
    
    printf("INPUT Base Number:: ");
    scanf("%d", &b);

    printf("\nINPUT Exponent Number:: ");
    scanf("%d", &x);

    // It will print the final output
    printf("\n\nOUTPUT:: %d^%d = %lld\n", b, x, FindPow(b, x, 1));
    return 0;
}

Run

 

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C Program to Find Power of a Number using pow() Function

1. Create three variables named b, x, and r with a double data type.
2. Assign input values in this b and x.
3. Apply the pow() function and assign its value in the r variable.
4. Print the final output.

 

// C Program to Find Power of a Number using pow() Function
#include <stdio.h>
#include <math.h>

// It's the driver function
int main() {
    double b, x, r;
    // b - Base value, x - Exponent value, r - Result value
    
    printf("INPUT Base Number:: ");
    scanf("%lf", &b);

    printf("\nINPUT Exponent Number:: ");
    scanf("%lf", &x);

    // It will calculate the power of the base number
    r = (double) pow(b, x);

    // It will print the final output
    printf("\n\nOUTPUT:: %lf ^ %lf = %lf\n", b, x, r);
    return 0;
}

Run

Output