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Computer Science IGCSEPDF 113
142 pagesrevision 46930
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NOT
The parameter must be false
OR
Either or both parameters must be true
8.1.9 i) Procedures and Functions
Local Variables:
● Their scope is a defined block of code/subroutine/procedure/function.
● Their value cannot be changed elsewhere in the program.
Global Variables:
● Their scope is the whole program.
● Their value can be changed anywhere in the program.
Parameters:
Values that are sent to a subroutine.
Procedures:
● It is a subroutine that does not return a value.
● It can have up to 3 parameters in this syllabus.
● The variables used in it are local variables.
Procedure without parameters
PROCEDURE <identifier>()
<statement(s)>
ENDPROCEDURE
CALL <identifier>()
Procedure with parameters
PROCEDURE <identifier>(<param1> : <data type>, <param2> : <data
type>...)
<statement(s)>
ENDPROCEDURE