Function Structure

Function

group of statements that together perform a task

REASONS:

• program modularization (easier to understand)

• code reuse

Function Declaration

Function Definition

Function Call

REQUIREMENTS OF FUNCTION

Function Declaration

tells the compiler about the function type, function name and its parameters

Function Definition

provides the actual syntax inside the function

Function Call

since only syntax inside the main() function will be executed

it implements the function inside the main() function

returnType functionName (parameters) {

(statement)

}

FUNCTION SYNTAX

returnType

can either be int, double, char, string, or bool which will be returned back to the main function after the function execution

functionName

user defined name that is use to reference the function

parameters

variables being passed from the main function to be used in the function

statements

series of syntax to be executed when a function is called.

Function Declaration

Function Definition

Function Call

3 REQUIREMENTS IN USING A FUNCTION

Declaring a Function

identifying the function name as well as the return type and parameters/arguments.

Return type

the variable data type that the function will return back to the main()

parameters/arguments

are variables/values that main() will pass to the functions

main

function must be called by its function name inside the ___() block.