| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 1 | .\" Copyright (c) 2003, Steven G. Kargl |
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| 25 | .\" $FreeBSD: src/lib/msun/man/round.3,v 1.6 2005/06/15 19:04:04 ru Exp $ |
| 26 | .\" |
| 27 | .Dd April 7, 2005 |
| 28 | .Dt ROUND 3 |
| 29 | .Os |
| 30 | .Sh NAME |
| 31 | .Nm round , |
| 32 | .Nm roundf , |
| 33 | .Nm roundl |
| 34 | .Nd round to nearest integral value |
| 35 | .Sh LIBRARY |
| 36 | .Lb libm |
| 37 | .Sh SYNOPSIS |
| 38 | .In math.h |
| 39 | .Ft double |
| 40 | .Fn round "double x" |
| 41 | .Ft float |
| 42 | .Fn roundf "float x" |
| 43 | .Ft "long double" |
| 44 | .Fn roundl "long double x" |
| 45 | .Sh DESCRIPTION |
| 46 | The |
| 47 | .Fn round , |
| 48 | .Fn roundf , |
| 49 | and |
| 50 | .Fn roundl |
| 51 | functions return the nearest integral value to |
| 52 | .Fa x ; |
| 53 | if |
| 54 | .Fa x |
| 55 | lies halfway between two integral values, then these |
| 56 | functions return the integral value with the larger |
| 57 | absolute value (i.e., they round away from zero). |
| 58 | .Sh SEE ALSO |
| 59 | .Xr ceil 3 , |
| 60 | .Xr floor 3 , |
| 61 | .Xr ieee 3 , |
| 62 | .Xr lrint 3 , |
| 63 | .Xr lround 3 , |
| 64 | .Xr math 3 , |
| 65 | .Xr rint 3 , |
| 66 | .Xr trunc 3 |
| 67 | .Sh STANDARDS |
| 68 | These functions conform to |
| 69 | .St -isoC-99 . |
| 70 | .Sh HISTORY |
| 71 | The |
| 72 | .Fn round |
| 73 | and |
| 74 | .Fn roundf |
| 75 | functions appeared in |
| 76 | .Fx 5.3 . |
| 77 | The |
| 78 | .Fn roundl |
| 79 | function appeared in |
| 80 | .Fx 6.0 . |