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

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roundlroundllround
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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

[edit] Parameters

arg - floating point value

[edit] Return value

Nearest integer to arg.

Return value
math-round away zero.svg
Argument

[edit] See also

nearest integer not greater than the given value
(function) [edit]
nearest integer not less than the given value
(function) [edit]
(C++11)
nearest integer not greater in magnitude than the given value
(function) [edit]