The procedures

Procedures are blocks of code that can be called several times and from multiple locations in the graph. A procedure is a subroutine which, unlike the functions, does not return a value at the end of its execution. A procedure can be declared anywhere on the graph. The form for declaring a procedure is as follows: - Proc Name(s) For example: - Proc Test(x) "Proc" is the keyword that always identifies a procedure or function. The "Test" label is the name of the procedure. The parameter "x" is the data that is passed to the code of the procedure. The parameters of a procedure are declared as local variables of the procedure. A Procedure can have one, more or no parameters. - Proc Name(x) Single parameter procedure - Proc Name(x,y,z) Procedure with three parameters. - Proc Name() Procedure without parameters. A procedure always ends with the keyword "EndProc". For example: - Proc Test(x) - ... - EndProc The variables instantiated inside a procedure are local variables that can only be used inside it. For example: - Proc Test(x) - y = 50 - Circle(x,y,20) - EndProc A procedure can be called from the main body of the graph and/or from the internal code of another procedure. For example: - Test(50) - - Proc Hello() - Test(25) - EndProc - - Proc Test(x) - Circle(x,50,30) - EndProc Procedures and functions can recall themselves in a recursive cycle, direct or indirect. Recursive cycles are monitored to avoid infinite loops. You can use recursion up to 256 times.