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# std::isless

From cppreference.com
< cpp‎ | numeric‎ | math

Defined in header `<cmath>` |  |
bool isless( float x, float y ); |  | (since C++11)
bool isless( double x, double y ); |  | (since C++11)
bool isless( long double x, long double y ); |  | (since C++11)

Determines if the floating point number `x` is less than the floating-point number `y`, without setting floating-point exceptions.

### [edit] Parameters

x | - | floating point value
y | - | floating point value

### [edit] Return value

true if x < y, false otherwise

### [edit] 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<.

### [edit] See also

less | function object implementing x < y (class template) [edit]
isgreater (C++11) | checks if the first floating-point argument is greater than the second (function) [edit]
C documentation for isless

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