March 2000
Intermediate to advanced
576 pages
18h 13m
English
Content preview from Delphi in a Nutshell
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Name
Boolean Type
Syntax
type Boolean = (False, True);
Description
The
Boolean type is an enumerated type with two
values. All comparison and logical operators produce a
Boolean result. Conditions for
if, while, and
repeat-until statements must be
of type Boolean or one of the other logical types
(ByteBool, WordBool, or
LongBool).
Tips and Tricks
Do not cast an integer value to Boolean. If you
want compatibility with C and C++, where any non-zero integer is
considered True, use the
ByteBool, WordBool, or
LongBool type instead of
Boolean. The three other types have the same
semantics, but different sizes. Unlike Boolean,
the other three types interpret any non-zero ordinal value as
True.
See Also
| And Keyword, ByteBool Type, LongBool Type, Not Keyword, Or Keyword, WordBool Type, Xor Keyword |
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.