SIMSCRIPT II.5 Programming Language

SIMSCRIPT II.5 Basic Concepts
X = Y
X ≥ Y
X < Y
X + Y = X * Y
is false
is true
is false
is false
For readability in different contexts, SIMSCRIPT II.5 provides alternative ways of writing logical
expressions. Table 1-3 relates the mathematical symbol of each relational operator with keyboard
symbols, English abbreviations, and "literary English" equivalents permitted in SIMSCRIPT II.5
comparisons.
Unless the keyboard symbols (column 2, table 1-3) are used, each relational operator must be separated
from the arithmetic expressions on either side by a parenthesis, or at least one blank.
Typical logical expressions are:
1. Y > O
2. AGE less than RETIREMENT
3. CODE not equal to ZIP
4. LEVEL < THRESHOLD
5. (FIXED + NUMBER * UNITS) greater than LOWBID
6. A >= (B * X ** 2 + 3.57/C)
7. (X ** 2 + Y ** 2) greater than Z ** 2
8. X ** 2 + Y ** 2 > Z ** 2
Examples 5, 6, and 7 demonstrate that the arithmetic expressions may be enclosed in parentheses
for clarity without changing their meaning. Examples 7 and 8 illustrate the use of equivalent forms
of a relational operator.
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