ceil, ceilf
Visual Studio 2005
Calculates the ceiling of a value.
double ceil( double x ); float ceil( float x ); // C++ only long double ceil( long double x ); // C++ only float ceilf( float x );
Parameters
- x
-
Floating-point value.
The ceil function returns a double value representing the smallest integer that is greater than or equal to x. There is no error return.
| Input | SEH Exception | Matherr Exception |
|---|---|---|
| ± QNAN,IND | none | _DOMAIN |
ceil has an implementation that uses Streaming SIMD Extensions 2 (SSE2). See _set_SSE2_enable for information and restrictions on using the SSE2 implementation.
| Routine | Required header | Compatibility |
|---|---|---|
| ceil, ceilf | <math.h> | ANSI, Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 |
For additional compatibility information, see Compatibility in the Introduction.
