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.TH FLOOR 2
.SH NAME
fabs, fmod, floor, ceil \- absolute value, remainder, floor, ceiling functions
.SH SYNOPSIS
.B #include <u.h>
.br
.B #include <libc.h>
.PP
.B
double floor(double x)
.PP
.B
double ceil(double x)
.PP
.B
double fabs(double x)
.PP
.B
double fmod(double x, double y)
.SH DESCRIPTION
.I Fabs
returns the absolute value
.RI | \|x\| |.
.PP
.I Floor
returns the
largest integer
not greater than
.IR x .
.PP
.I Ceil
returns the
smallest integer
not less than
.IR x .
.PP
.I Fmod
returns
.I x
if
.I y
is zero, otherwise the number
.I f
with the same sign as
.IR x ,
such that
.I "x = iy + f\|"
for some integer
.IR i ,
and
.RI | \|f\| |
<
.RI | \|y\| |.
.SH SOURCE
.B /sys/src/libc/port
.SH SEE ALSO
.IR abs (2),
.IR frexp (2)
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