http://www.bing.com:80/search?q=Bool+Data+Type+in+SQL+QuerySearch resultshttp://www.bing.com:80/s/a/rsslogo.gifhttp://www.bing.com:80/search?q=Bool+Data+Type+in+SQL+QueryCopyright © 2026 Microsoft. All rights reserved. These XML results may not be used, reproduced or transmitted in any manner or for any purpose other than rendering Bing results within an RSS aggregator for your personal, non-commercial use. Any other use of these results requires express written permission from Microsoft Corporation. By accessing this web page or using these results in any manner whatsoever, you agree to be bound by the foregoing restrictions.https://stackoverflow.com/questions/1181491/whats-the-difference-between-bool-and-boolbool is a value type, this means that it cannot be null, so the Nullable type basically allows you to wrap value types, and being able to assign null to them. bool? can contain three different values: true, false and null.Tue, 14 Apr 2026 07:12:00 GMThttps://stackoverflow.com/questions/8724349/difference-between-bool-and-bool-types-in-cThese data types were added in C99. Since bool wasn't reserved prior to C99, they use the _Bool keyword (which was reserved). bool is an alias for _Bool if you include stdbool.h. Basically, including the stdbool.h header is an indication that your code is OK with the identifier bool being 'reserved', i.e. that your code won't use it for its own purposes (similarly for the identifiers true and ...Sun, 12 Apr 2026 14:52:00 GMThttps://stackoverflow.com/questions/1921539/using-boolean-values-in-cbool and _Bool, and true and false are language keywords for boolean types. bool / _Bool is a type that can hold either the value true or false. Logical operators !, ||, and && can be used.Wed, 25 Mar 2026 12:00:00 GMThttps://stackoverflow.com/questions/134746/what-is-the-difference-between-bool-and-boolean-types-in-c-sharp2 bool is a primitive type, meaning that the value (true/false in this case) is stored directly in the variable. Boolean is an object. A variable of type Boolean stores a reference to a Boolean object. The only real difference is storage.Wed, 15 Apr 2026 10:45:00 GMThttps://stackoverflow.com/questions/1608318/is-bool-a-native-c-type439 bool exists in the current C - C99, but not in C89/90. In C99 the native type is actually called _Bool, while bool is a standard library macro defined in stdbool.h (which expectedly resolves to _Bool). Objects of type _Bool hold either 0 or 1, while true and false are also macros from stdbool.h.Sun, 12 Apr 2026 20:07:00 GMThttps://stackoverflow.com/questions/6420526/what-is-the-difference-between-bool-and-boolThe values for a bool are true and false, whereas for BOOL you can use any int value, though TRUE and FALSE macros are defined in the windef.h header. This means that the sizeof operator will yield 1 for bool (the standard states, though, that the size of bool is implementation defined), and 4 for BOOL.Sun, 12 Apr 2026 01:52:00 GMThttps://stackoverflow.com/questions/2064550/why-is-bool-8-bits-long-in-cIn C++, why is the bool type 8 bits long (on my system)? Only one bit is enough to hold the Boolean value. I used to believe it was for performance reasons, but then on a 32 bits or 64 bits machine,Mon, 13 Apr 2026 14:44:00 GMThttps://stackoverflow.com/questions/3269478/what-is-bool-in-cBool is a well-defined primitive integral type, just like int, char, etc. It also has mathematical conversions to other integral types, which can sometimes be confusing for people, but I don't think that is the source of your current confusion.Mon, 13 Apr 2026 07:34:00 GMThttps://stackoverflow.com/questions/7967924/how-a-bool-type-variable-is-stored-in-memory-cThis implies that array test1 (that was created using bool test1[32]) takes at least 32 bytes (1 byte per element). If you want multiple boolean values to be stored in a single variable, use std::bitset or std::vector<bool> (but be aware that the latter is not really a vector of bools, it is a specialization designed to save space).Thu, 09 Apr 2026 08:00:00 GMThttps://stackoverflow.com/questions/541289/objective-c-bool-vs-boolSo, yes, you can assume that BOOL is a char. You can use the (C99) bool type, but all of Apple's Objective-C frameworks and most Objective-C/Cocoa code uses BOOL, so you'll save yourself headache if the typedef ever changes by just using BOOL.Mon, 13 Apr 2026 00:10:00 GMT