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# std::islessequal

From cppreference.com
< cpp‎ | numeric‎ | math

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

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.

### [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_equal | function object implementing x <= y (class template) [edit]
isgreaterequal (C++11) | checks if the first floating-point argument is greater or equal than the second (function) [edit]
C documentation for islessequal

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