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std::islessequal(3) C++ Standard Libary std::islessequal(3)


std::islessequal - std::islessequal


Defined in header <cmath>
bool islessequal( float x, float y ); (1) (since C++11)
(constexpr since C++23)
bool islessequal( double x, double y ); (2) (since C++11)
(constexpr since C++23)
bool islessequal( long double x, long double y ); (3) (since C++11)
(constexpr since C++23)
bool islessequal( Arithmetic x, Arithmetic y ); (4) (since C++11)
(constexpr since C++23)

1-3) Determines if the floating point number x is less than or equal to the
floating-point number y, without setting floating-point exceptions.
4) A set of overloads or a function template for all combinations of arguments of
arithmetic type not covered by (1-3). If any argument has integral type, it is cast
to double.


x - floating point value
y - floating point value

Return value

true if x <= y, false otherwise


The built-in operator<= for floating-point numbers may raise FE_INVALID if one or
both of the arguments is NaN. This function is a "quiet" version of operator<=.

See also

less_equal function object implementing x <= y
(class template)
isgreaterequal checks if the first floating-point argument is greater or equal than
(C++11) the second