SIMSCRIPT II.5 Programming Language

SIMSCRIPT II.5 Basic Concepts
if STATUS = BUSY
add 1 to NO.IN.QUEUE
else
let STATUS = BUSY
always
Here, a STATUS variable is tested against a value denoting BUSY status. The variable NO.IN.QUEUE
is incremented if the status flag is busy and the flow of control passes to always. Otherwise, the
status flag is set to reflect the now BUSY status and control naturally passes to the always statement.
logical
expression
False
ELSE
True
first group
of
statements
second group
of statements
ALWAYS
Figure 1-1. Flow of Control After an if Statement
The else statement and 'second group of statements' are optional. There are cases when the choice
is simply whether or not to perform an action. This shortened form of the if statement is:
if logical expression
group of statements
always
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