SIMSCRIPT II.5 Programming Language

SIMSCRIPT II.5 Programming Language
and is flowcharted in figure 1-2. When the logical expression is true, the group of statements is executed
and flow of control continues through the always statement. When the logical expression
is false, control transfers directly to the always. For example:
If X less than A
let A = X + Y
let B = X - Y
always
logical
expression
True
group
of
statements
False
ALWAYS
Figure 1-2. Flow of Control After Shortened if Statement
To improve program readability, the logical expression appearing in an if statement may be optionally
followed by a comma. The word is may also be used before the "English" versions of the
relational operators in logical expressions. Examples are:
if STATUS is not equal to BUSY,
if X is less than A,
Also, because logical comparisons with the value zero occur frequently in programming, the words
zero, positive, and negative may be combined with the words is and is not, replacing
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