NAME¶

std::isless - std::isless

Synopsis¶

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

1-3) Determines if the floating point number x is less than 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.

Parameters¶

x - floating point value
y - floating point value

Return value¶

true if x < y, false otherwise

Notes¶

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