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Function
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- | + | [[Category:General]] | |
- | + | [[Category:reserved]] | |
- | + | [[Category:language]] | |
- | + | [[category:basic statement]] | |
- | + | ||
- | + | [[Basic statements|'''Up to Basic Statements''']] | |
- | + | [[:Category:functions|'''List of Functions''']] | |
+ | ---- | ||
- | + | == Definition == | |
+ | |||
+ | === Statement === | ||
+ | '''Function''' <returntype> <name>([<parameters>]); | ||
+ | |||
+ | Function is a reserved word used to start the code of a function. | ||
+ | |||
+ | === Concept === | ||
+ | A function is a [[subroutine]] to which one or more of the following apply: | ||
+ | *it receives [[parameters]] | ||
+ | *it acts on the parameters | ||
+ | *it processes [[data]] located elsewhere | ||
+ | *it [[return]]s a [[value]] | ||
+ | |||
+ | The difference between a function and a [[process]] is that the calling process or function waits until the function is completed. When a process or function calls a process, it doesn't wait. This means that, even when the called function contains [[frame]] statements, the calling function or process still waits for the function to finish. This is shown in [[Tutorial:Textinput|this tutorial]]. | ||
+ | |||
+ | For a list of functions, see [[:Category:functions|this list of functions]]. | ||
- | + | == Example == | |
+ | <pre> | ||
+ | Function int addInts( int a , int b ) | ||
+ | Private // Declare private variables here | ||
+ | Begin // Start the main functioncode | ||
+ | return a+b; | ||
+ | End // End the main functioncode | ||
+ | </pre> | ||
+ | addInts(3,6); will return 9. One can see that the function does indeed: | ||
+ | *receive parameters. | ||
+ | *act on the parameters. | ||
+ | *return a value. |
Current revision
Contents |
[edit] Definition
[edit] Statement
Function <returntype> <name>([<parameters>]);
Function is a reserved word used to start the code of a function.
[edit] Concept
A function is a subroutine to which one or more of the following apply:
- it receives parameters
- it acts on the parameters
- it processes data located elsewhere
- it returns a value
The difference between a function and a process is that the calling process or function waits until the function is completed. When a process or function calls a process, it doesn't wait. This means that, even when the called function contains frame statements, the calling function or process still waits for the function to finish. This is shown in this tutorial.
For a list of functions, see this list of functions.
[edit] Example
Function int addInts( int a , int b ) Private // Declare private variables here Begin // Start the main functioncode return a+b; End // End the main functioncode
addInts(3,6); will return 9. One can see that the function does indeed:
- receive parameters.
- act on the parameters.
- return a value.