Subroutines

Define a subroutine

A sequence of instructions designed to perform a specific task with an identifiable name

A subroutine call has

arguments

Parameters

A value that adds extra information to a procedure or function to adjust its behaviour.

Passing parameters

Specifying the input parameters at the start of a procedure or a function.

How are subroutines represented in flow charts?

Define a procedure without parameters in pseudocode

PROCEDURE

ENDPROCEDURE

Define a procedure with parameters in pseudocode

PROCEDURE (:, :…)

ENDPROCEDURE

Call a procedure both without and with parameters

CALL
CALL (Value1,Value2…)

procedure vs function

A procedure performs a task, whereas a function produces information.

Define a function without parameters

FUNCTION RETURNS

ENDFUNCTION

Define a function with parameters

FUNCTION (:, :…) RETURNS

ENDFUNCTION

the keyword CALL is used to call…

procedures