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C function argument and return values
Here we will see what are the different types of C functions based on the return values and arguments.
So a function either can take some arguments, or nothing is taken. Similarly, a function can return something, otherwise does not return anything. So we can categorize them into four types.
- Function with No argument and No return type.
- Function with No argument and Return something.
- A function that takes argument but returns nothing.
- Functions that take an argument and also return something.
Example
#include <stdio.h>
void my_function() {
printf("This is a function that takes no argument, and returns nothing.");
}
main() {
my_function();
}Output
This is a function that takes no argument, and returns nothing.
Here this function is not taking any input argument, and also the return type is void. So this returns nothing.
Example
#include <stdio.h>
int my_function() {
printf("This function takes no argument, But returns 50
");
return 50;
}
main() {
int x;
x = my_function();
printf("Returned Value: %d", x);
}Output
This function takes no argument, But returns 50 Returned Value: 50
Here this function is not taking any input argument, but its return type is int. So this returns a value.
Example
#include <stdio.h>
void my_function(int x) {
printf("This function is taking %d as argument, but returns nothing", x);
return 50;
}
main() {
int x;
x = 10;
my_function(x);
}Output
This function is taking 10 as argument, but returns nothing
Here this function is taking an input argument, but its return type is void. So this returns nothing.
Example
#include <stdio.h>
int my_function(int x) {
printf("This will take an argument, and will return its squared value
");
return x * x;
}
main() {
int x, res;
x = 12;
res = my_function(12);
printf("Returned Value: %d", res);
}Output
This function is taking 10 as argument, but returns nothing
Here this function is taking any input argument, and also returns value.
Updated on: 30-Jul-2019
8K+ Views
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