sqrt.3 (ce448a2e74f01e8e92eb8e0e0be504288c1b3653) sqrt.3 (e43c8f6acca33435d2f0b2adc21592d0fd4f5459)
1.\" Copyright (c) 1985, 1991 Regents of the University of California.
2.\" All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.

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24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91
29.\" $FreeBSD$
30.\"
1.\" Copyright (c) 1985, 1991 Regents of the University of California.
2.\" All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.

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23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91
29.\" $FreeBSD$
30.\"
31.Dd December 14, 2007
31.Dd March 1, 2008
32.Dt SQRT 3
33.Os
34.Sh NAME
35.Nm cbrt ,
36.Nm cbrtf ,
37.Nm sqrt ,
32.Dt SQRT 3
33.Os
34.Sh NAME
35.Nm cbrt ,
36.Nm cbrtf ,
37.Nm sqrt ,
38.Nm sqrtf
38.Nm sqrtf ,
39.Nm sqrtl
39.Nd cube root and square root functions
40.Sh LIBRARY
41.Lb libm
42.Sh SYNOPSIS
43.In math.h
44.Ft double
45.Fn cbrt "double x"
46.Ft float
47.Fn cbrtf "float x"
48.Ft double
49.Fn sqrt "double x"
50.Ft float
51.Fn sqrtf "float x"
40.Nd cube root and square root functions
41.Sh LIBRARY
42.Lb libm
43.Sh SYNOPSIS
44.In math.h
45.Ft double
46.Fn cbrt "double x"
47.Ft float
48.Fn cbrtf "float x"
49.Ft double
50.Fn sqrt "double x"
51.Ft float
52.Fn sqrtf "float x"
53.Ft long double
54.Fn sqrtl "long double x"
52.Sh DESCRIPTION
53The
54.Fn cbrt
55and the
56.Fn cbrtf
57functions compute
58the cube root of
59.Ar x .
60.Pp
61The
55.Sh DESCRIPTION
56The
57.Fn cbrt
58and the
59.Fn cbrtf
60functions compute
61the cube root of
62.Ar x .
63.Pp
64The
62.Fn sqrt
63and the
64.Fn sqrtf
65.Fn sqrt ,
66.Fn sqrtf ,
67and
68.Fn sqrtl
65functions compute the
66non-negative square root of x.
67.Sh RETURN VALUES
68The
69.Fn cbrt
70and the
71.Fn cbrtf
72functions return the requested cube root.
73The
69functions compute the
70non-negative square root of x.
71.Sh RETURN VALUES
72The
73.Fn cbrt
74and the
75.Fn cbrtf
76functions return the requested cube root.
77The
74.Fn sqrt
75and the
76.Fn sqrtf
78.Fn sqrt ,
79.Fn sqrtf ,
80and
81.Fn sqrtl
77functions return the requested square root
78unless an error occurs.
79An attempt to take the
80.Fn sqrt
81of negative
82.Fa x
83raises an invalid exception and causes an \*(Na to be returned
84(except that the square root of -0 is valid and equal to -0.)
85.Sh SEE ALSO
86.Xr fenv 3 ,
87.Xr math 3
88.Sh STANDARDS
89The
90.Fn cbrt ,
91.Fn cbrtf ,
92.Fn sqrt ,
82functions return the requested square root
83unless an error occurs.
84An attempt to take the
85.Fn sqrt
86of negative
87.Fa x
88raises an invalid exception and causes an \*(Na to be returned
89(except that the square root of -0 is valid and equal to -0.)
90.Sh SEE ALSO
91.Xr fenv 3 ,
92.Xr math 3
93.Sh STANDARDS
94The
95.Fn cbrt ,
96.Fn cbrtf ,
97.Fn sqrt ,
98.Fn sqrtf ,
93and
99and
94.Fn sqrtf
100.Fn sqrtl
95functions conform to
96.St -isoC-99 .
97.Sh HISTORY
98The
99.Fn cbrt
100function appeared in
101.Bx 4.3 .
101functions conform to
102.St -isoC-99 .
103.Sh HISTORY
104The
105.Fn cbrt
106function appeared in
107.Bx 4.3 .
108The
109.Fn sqrtl
110function appeared in
111.Fx 8.0 .