| .\" Copyright 2001 Andries Brouwer <aeb@cwi.nl>. |
| .\" |
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| .TH LROUND 3 2001-05-31 "" "Linux Programmer's Manual" |
| .SH NAME |
| lround, lroundf, lroundl, llround, llroundf, llroundl \- round to nearest integer, away from zero |
| .SH SYNOPSIS |
| .nf |
| .B #include <math.h> |
| .sp |
| .BI "long int lround(double " x ); |
| .br |
| .BI "long int lroundf(float " x ); |
| .br |
| .BI "long int lroundl(long double " x ); |
| .sp |
| .BI "long long int llround(double " x ); |
| .br |
| .BI "long long int llroundf(float " x ); |
| .br |
| .BI "long long int llroundl(long double " x ); |
| .fi |
| .sp |
| Compile with \-std=c99; link with \-lm. |
| .SH DESCRIPTION |
| These functions round their argument to the nearest integer value, |
| rounding away from zero, regardless of the current rounding direction. |
| If \fIx\fP is infinite or NaN, or if the rounded value is outside |
| the range of the return type, the numeric result is unspecified. |
| A domain error may occur if the magnitude of \fIx\fP is too large. |
| .SH "RETURN VALUE" |
| The rounded integer value. |
| Note that unlike |
| .BR round (3), |
| .BR ceil (3), |
| etc., the return type of these functions differs from |
| that of their arguments. |
| .SH ERRORS |
| .TP |
| .B EDOM |
| The magnitude of \fIx\fP is too large and |
| .I "(math_errhandling & MATH_ERRNO)" |
| is non-zero. |
| .SH "CONFORMING TO" |
| C99. |
| .SH "SEE ALSO" |
| .BR ceil (3), |
| .BR floor (3), |
| .BR lrint (3), |
| .BR nearbyint (3), |
| .BR rint (3), |
| .BR round (3) |