Boolean literals

 

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Expressions

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value categories (lvalue, rvalue, xvalue)

order of evaluation (sequence points)

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primary expressions

lambda-expression(C++11)

Literals

integer literals

floating-point literals

boolean literals

character literals including escape sequences

string literals

null pointer literal(C++11)

user-defined literal(C++11)

Operators

Assignment operators: a=b, a+=b, a-=b, a*=b, a/=b, a%=b, a&=b, a|=b, a^=b, a<<=b, a>>=b

Increment and decrement: ++a, --a, a++, a--

Arithmetic operators: +a, -a, a+b, a-b, a*b, a/b, a%b, ~a, a&b, a|b, a^b, a<<b, a>>b

Logical operators: a||b, a&&b, !a

Comparison operators: a==b, a!=b, a<b, a>b, a<=b, a>=b, a<=>b(C++20)

Member access operators: a[b], *a, &a, a->b, a.b, a->*b, a.*b

Other operators: a(...), a,b, a?b:c

new-expression

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alignof

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typeid

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Fold expression(C++17)

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Default comparisons(C++20)

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Implicit conversions

const_cast

static_cast

reinterpret_cast

dynamic_cast

Explicit conversions (T)a, T(a)

User-defined conversion

 

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.

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