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  11 .TH trunc 3M "12 Jul 2006" "SunOS 5.11" "Mathematical Library Functions"
  12 .SH NAME
  13 trunc, truncf, truncl \- round to truncated integer value
  14 .SH SYNOPSIS
  15 .LP
  16 .nf
  17 c99 [ \fIflag\fR... ] \fIfile\fR... \fB-lm\fR [ \fIlibrary\fR... ]
  18 #include <math.h>
  19 
  20 \fBdouble\fR \fBtrunc\fR(\fBdouble\fR \fIx\fR);
  21 .fi
  22 
  23 .LP
  24 .nf
  25 \fBfloat\fR \fBtruncf\fR(\fBfloat\fR \fIx\fR);
  26 .fi
  27 
  28 .LP
  29 .nf
  30 \fBlong double\fR \fBtruncl\fR(\fBlong double\fR \fIx\fR);
  31 .fi
  32 
  33 .SH DESCRIPTION
  34 .sp
  35 .LP
  36 These functions round their argument to the integer value, in floating format,
  37 nearest to but no larger in magnitude than the argument.
  38 .SH RETURN VALUES
  39 .sp
  40 .LP
  41 Upon successful completion, these functions return the truncated integer value.
  42 .sp
  43 .LP
  44 If \fIx\fR is NaN, a NaN is returned.
  45 .sp
  46 .LP
  47 If \fIx\fR is \(+-0 or \(+-Inf, \fIx\fR is returned.
  48 .SH ERRORS
  49 .sp
  50 .LP
  51 No errors are defined.
  52 .SH ATTRIBUTES
  53 .sp
  54 .LP
  55 See \fBattributes\fR(5) for descriptions of the following attributes:
  56 .sp
  57 
  58 .sp
  59 .TS
  60 tab() box;
  61 cw(2.75i) |cw(2.75i) 
  62 lw(2.75i) |lw(2.75i) 
  63 .
  64 ATTRIBUTE TYPEATTRIBUTE VALUE
  65 _
  66 Interface StabilityStandard
  67 _
  68 MT-LevelMT-Safe
  69 .TE
  70 
  71 .SH SEE ALSO
  72 .sp
  73 .LP
  74 \fBmath.h\fR(3HEAD), \fBattributes\fR(5), \fBstandards\fR(5)