##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

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

From cppreference.com
< cpp‎ | numeric‎ | math

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
Argument

### [edit] See also

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

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/numeric/math/round&oldid=62878"