Boolean literals
From cppreference.com
Syntax
true
|
(1) | ||||||||
false
|
(2) | ||||||||
Explanation
The Boolean literals are the keywords true and false. They are prvalues of type bool.
Notes
See Integral conversions for implicit conversions from bool to other types and boolean conversions for the implicit conversions from other types to bool.
Keywords
Example
Run this code
#include <iostream> int main() { std::cout << std::boolalpha << true << '\n' << false << '\n' << std::noboolalpha << true << '\n' << false << '\n'; }
Output:
true false 1 0
References
- C++23 standard (ISO/IEC 14882:2024):
- 5.13.6 Boolean literals [lex.bool]
- C++20 standard (ISO/IEC 14882:2020):
- 5.13.6 Boolean literals [lex.bool]
- C++17 standard (ISO/IEC 14882:2017):
- 5.13.6 Boolean literals [lex.bool]
- C++14 standard (ISO/IEC 14882:2014):
- 2.13.6 Boolean literals [lex.bool]
- C++11 standard (ISO/IEC 14882:2011):
- 2.13.6 Boolean literals [lex.bool]
- C++98 standard (ISO/IEC 14882:1998):
- 2.13.5 Boolean literals [lex.bool]
See also
| C documentation for Predefined Boolean constants
|