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12 .TH CEIL 3M "Jul 12, 2006" "SunOS 5.11" "Mathematical Library Functions"
14 ceil, ceilf, ceill \- ceiling value function
18 c99 [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ]
21 \fBdouble\fR \fBceil\fR(\fBdouble\fR \fIx\fR);
26 \fBfloat\fR \fBceilf\fR(\fBfloat\fR \fIx\fR);
31 \fBlong double\fR \fBceill\fR(\fBlong double\fR \fIx\fR);
37 These functions compute the smallest integral value not less than \fIx\fR.
41 Upon successful completion, the \fBceil()\fR, \fBceilf()\fR, and \fBceill()\fR
42 functions return the smallest integral value not less than \fIx\fR, expressed
43 as a type \fBdouble\fR, \fBfloat\fR, or \fBlong double\fR, respectively.
46 If \fIx\fR is NaN, a NaN is returned.
49 If \fIx\fR is \(+-0 or \(+-Inf, \fIx\fR is returned.
53 The integral value returned by these functions need not be expressible as an
54 \fBint\fR or \fBlong int\fR. The return value should be tested before assigning
55 it to an integer type to avoid the undefined results of an integer overflow.
59 See \fBattributes\fR(5) for descriptions of the following attributes:
68 ATTRIBUTE TYPE ATTRIBUTE VALUE
70 Interface Stability Standard
78 \fBfeclearexcept\fR(3M), \fBfetestexcept\fR(3M), \fBfloor\fR(3M),
79 \fBisnan\fR(3M), \fBmath.h\fR(3HEAD), \fBattributes\fR(5), \fBstandards\fR(5)