SQRT
Section: Mathematical Library (3M)
Updated: May 12, 1986
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NAME
cbrt, sqrt - cube root, square root
SYNOPSIS
#include <math.h>
double cbrt(x)
double x;
double sqrt(x)
double x;
DESCRIPTION
Cbrt(x) returns the cube root of x.
Sqrt(x) returns the square root of x.
DIAGNOSTICS
On a VAX, sqrt(negative)
returns the reserved operand and sets errno to EDOM .
ERROR (due to Roundoff etc.)
Cbrt is accurate to within 0.7 ulps.
Sqrt on a VAX is accurate to within 0.501 ulps.
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 ulp in the default mode (round-to-nearest).
An ulp is one Unit in the Last Place carried.
SEE ALSO
math(3M), infnan(3M)
AUTHOR
W. Kahan
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- DIAGNOSTICS
-
- ERROR (due to Roundoff etc.)
-
- SEE ALSO
-
- AUTHOR
-
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