SQRT(3) BSD Programmer's Manual SQRT(3)
c
\bcb
\bbr
\brt
\bt, s
\bsq
\bqr
\brt
\bt - cube root and square root functions
S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
#
\b#i
\bin
\bnc
\bcl
\blu
\bud
\bde
\be <
\b<m
\bma
\bat
\bth
\bh.
\b.h
\bh>
\b>
c
\bcb
\bbr
\brt
\bt(_
\bd_
\bo_
\bu_
\bb_
\bl_
\be _
\bx);
s
\bsq
\bqr
\brt
\bt(_
\bd_
\bo_
\bu_
\bb_
\bl_
\be _
\bx);
D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
The c
\bcb
\bbr
\brt
\bt() function computes the cube root of _
\bx.
The s
\bsq
\bqr
\brt
\bt() computes the non-negative square root of x.
R
\bRE
\bET
\bTU
\bUR
\bRN
\bN V
\bVA
\bAL
\bLU
\bUE
\bES
\bS
The c
\bcb
\bbr
\brt
\bt() function returns the requested cube root. The s
\bsq
\bqr
\brt
\bt() function
returns the requested square root unless an error occurs. On the VAX or
Tahoe processor an attempt to take the s
\bsq
\bqr
\brt
\bt() of negative _
\bx causes an er-
ror; in this event, the global variable _
\be_
\br_
\br_
\bn_
\bo is set to EDOM and a re-
served operand fault is generated.
E
\bER
\bRR
\bRO
\bOR
\bR (
\b(d
\bdu
\bue
\be t
\bto
\bo R
\bRo
\bou
\bun
\bnd
\bdo
\bof
\bff
\bf e
\bet
\btc
\bc.
\b.)
\b)
The c
\bcb
\bbr
\brt
\bt() function is accurate to within 0.7 _
\bu_
\bl_
\bp_
\bs.
The s
\bsq
\bqr
\brt
\bt() function on a VAX is accurate to within 0.501 _
\bu_
\bl_
\bp_
\bs. Sqrt on a
machine that conforms to IEEE 754 is correctly rounded in accordance with
the rounding mode in force; the error is less than half an _
\bu_
\bl_
\bp in the de-
fault mode (round-to-nearest). An _
\bu_
\bl_
\bp is one _
\bUnit in the _
\bLast _
\bPlace car-
S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
S
\bST
\bTA
\bAN
\bND
\bDA
\bAR
\bRD
\bDS
\bS
The s
\bsq
\bqr
\brt
\bt function conforms to ANSI C X3.159-1989 (``ANSI C '').
H
\bHI
\bIS
\bST
\bTO
\bOR
\bRY
\bY
The c
\bcb
\bbr
\brt
\bt function appeared in 4.3BSD.
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