Function Parameters
Lesson 3 of 17 in Coddy's Functions in C course.
A function can take parameters to get data from outside and use it during its execution. The parameters are listed in parentheses after the function name like this:
type function_name(type parameter1, type parameter2, ... type parameterN)Each parameter has a type and a name, separated by commas.
For example, to display different messages on the console, we can define a function that takes a string as a parameter:
#include <stdio.h>
void hello(char str[])
{
printf("%s\n", str);
}
int main(void)
{
hello("Welcome to Coddy");
hello("Coddy.tech");
hello("C with Coddy");
}The function hello() takes one parameter str of type char[]. This parameter is called a formal parameter.
In the main function, we call hello() three times with different strings: "Welcome to Coddy", "Coddy.tech", and "C with Coddy". These strings are called arguments. This will print:
Welcome to Coddy
Coddy.tech
C with CoddyTo use more parameters, separate them with commas like this:
void hello(int a, int b)
{
// function body
}
Challenge
EasyIn the given code, define a function called sum that takes two parameters, a and b. The function will print the sum of a and b.
Try it yourself
#include <stdio.h>
// Define the sum function here
int main(void)
{
// Example don't change this !
sum(15, 200);
}