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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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significand(3) Library Functions Manual significand(3)
significand, significandf, significandl - get mantissa of
floating-point number
Math library (libm, -lm)
#include <math.h>
double significand(double x);
float significandf(float x);
long double significandl(long double x);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
significand(), significandf(), significandl():
/* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
These functions return the mantissa of x scaled to the range
[1, FLT_RADIX). They are equivalent to
scalb(x, (double) -ilogb(x))
This function exists mainly for use in certain standardized tests
for IEEE 754 conformance.
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├─────────────────────────────────────┼───────────────┼─────────┤
│ significand(), significandf(), │ Thread safety │ MT-Safe │
│ significandl() │ │ │
└─────────────────────────────────────┴───────────────┴─────────┘
None.
significand()
BSD.
significand()
BSD.
ilogb(3), scalb(3)
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Linux man-pages 6.9.1 2024-05-02 significand(3)
Pages that refer to this page: ilogb(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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