In programming, a function is a procedure that performs a specific task. It is a named block of code that can be called several times, from several different places, during a single execution of a program.
Most programming languages have prewritten set of functions called default functions that are kept in a library. One can also write one's own functions which is called user defined function to perform specialized tasks.
A function may have the following parts:
- Function Name: The functions must have name and the name follow the naming conventions.
- Return Type: Returning data type of the function (void, integer, char, float etc.).
- Parameters or Arguments: Parameters are placeholders that are passed into the function.
- Function Body: Collection of statements that defines what the function actually does.
Example:
Function in C programming.
int print_result(int num1, int num2)
{
int result;
result=num1+num2;
return result;
}