| Booleans | ||
|---|---|---|
 | Chapter 4. Data Types, Values, and Ranges |  |
Booleans
Unlike many programming languages, SIMPOL includes a true Boolean data type
and in what is becoming typically classic SIMPOL style, it can have four
distinct values, .true, .false,
.nul, and .inf. An important point to
remember when using expressions in statements such as
while and if is that unless the result
of the expression is the boolean value .true, then it may
very likely be considered to be false.