Function
Jump to navigation
Jump to search
Syntax
| Syntax legend | |
|---|---|
| < ... > | item |
| [ ... ] | optional |
| ( ... ) * | 0 or more times |
| ( ... ) + | 1 or more times |
Function <returntype> <name> ( [ <parameters> ] )
[ Public
- [ <public variables> ]
End ]
[ Private
- [ <private variables> ]
End ]
Begin
- [ <function code> ]
[ OnExit
- [ <exit code> ]
]
End
Description
Function is a reserved word used to start the code of a function.
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.
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.