std::round, std::lround, std::llround

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

Computes nearest integer to arg. Number is rounded away from zero in halfway cases

Parameters

arg

-

floating point value

Return value

Nearest integer to arg.

Return value

Argument

See also

floor	nearest integer not greater than the given value (function)
ceil	nearest integer not less than the given value (function)
trunc (C++11)	nearest integer not greater in magnitude than the given value (function)