std::trunc

From Cppreference

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Defined in header <cmath>
float       trunc( float arg );		(since C++11)
double      trunc( double arg );		(since C++11)
long double trunc( long double arg );		(since C++11)
double      trunc( Integral arg );		(since C++11)

Computes nearest integer not greater in magnitude than arg.

Contents 1 Parameters 2 Return value 3 Notes 4 See also

[edit] Parameters

arg

-

floating point value

[edit] Return value

nearest integer not greater in magnitude than arg.

[edit] Notes

The integer value can be always represented by the given floating point type.

[edit] See also

floor	nearest integer not greater than the given value (function)
ceil	nearest integer not less than the given value (function)
round lround llround (C++11) (C++11) (C++11)	nearest integer, rounding away from zero in halfway cases (function)