What is a Function Definition?

The function definition is where you provide the actual body of the function, specifying what the function does.

Syntax

return_type function_name(parameter1_type parameter1, ...) {

// Function body

// Return value (if any)

Example

#include < stdio.h>
void main
int addNumbers(int a, int b) 
{
    return a + b;
}

int main() {
    printf("Sum: %d\n", addNumbers(5, 3));
    return 0;
}