Function & Recursion – Let us C

Function Pointers

Pravesh Agrawal — Sat, 02 Dec 2023 11:10:47 +0000

#include 

// Function to add two numbers
int add(int a, int b) {
    return a + b;
}

// Function to subtract two numbers
int subtract(int a, int b) {
    return a - b;
}

int main() {
    // Function pointers example
    int (*operation)(int, int);

    operation = add;
    printf("Addition: %d\n", operation(5, 3));

    operation = subtract;
    printf("Subtraction: %d\n", operation(5, 3));

    return 0;
}

Function with Default Parameter Value

Pravesh Agrawal — Sat, 02 Dec 2023 11:10:24 +0000

#include 

// Function with default parameter value
int power(int base, int exponent) {
    int result = 1;
    for (int i = 0; i < exponent; i++) {
        result *= base;
    }
    return result;
}

int main() {
    // Function with default parameter value
    int base = 2;
    int exponent = 3;
    int result = power(base, exponent);
    printf("%d to the power of %d: %d\n", base, exponent, result);

    return 0;
}

Recursive Factorial Function

Pravesh Agrawal — Sat, 02 Dec 2023 11:10:06 +0000

#include 

// Recursive factorial function
int factorial(int n) {
    if (n == 0 || n == 1) {
        return 1;
    } else {
        return n * factorial(n - 1);
    }
}

int main() {
    // Recursive factorial function example
    int num = 5;
    int result = factorial(num);
    printf("Factorial of %d: %d\n", num, result);

    return 0;
}

Function with Parameters and Return Value

Pravesh Agrawal — Sat, 02 Dec 2023 11:09:49 +0000

#include 

// Function to calculate the square of a number
int square(int num) {
    return num * num;
}

int main() {
    // Function with parameters and return value
    int number = 4;
    int result = square(number);
    printf("Square of %d: %d\n", number, result);

    return 0;
}

Simple Function

Pravesh Agrawal — Sat, 02 Dec 2023 11:09:28 +0000

#include 

// Function to add two numbers
int add(int a, int b) {
    return a + b;
}

int main() {
    // Simple function example
    int result = add(5, 7);
    printf("Sum: %d\n", result);

    return 0;
}