Manual Pages for Linux CentOS command on man scalblnl
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Manual Pages for Linux CentOS command on man scalblnl

SCALBLN(3) Linux Programmer's Manual SCALBLN(3)

NAME

scalbn, scalbnf, scalbnl, scalbln, scalblnf, scalblnl - multiply float‐

ing-point number by integral power of radix SYNOPSIS

#include double scalbln(double x, long int exp); float scalblnf(float x, long int exp); long double scalblnl(long double x, long int exp); double scalbn(double x, int exp); float scalbnf(float x, int exp); long double scalbnl(long double x, int exp);

Link with -lm. Feature Test Macro Requirements for glibc (see featuretestmacros(7)): scalbln(), scalblnf(), scalblnl(): XOPENSOURCE >= 600 || ISOC99SOURCE || POSIXCSOURCE >= 200112L;

or cc -std=c99 scalbn(), scalbnf(), scalbnl(): BSDSOURCE || SVIDSOURCE || XOPENSOURCE >= 600 || ISOC99SOURCE || POSIXCSOURCE >= 200112L;

or cc -std=c99 DESCRIPTION These functions multiply their first argument x by FLTRADIX (probably 2) to the power of exp, that is: x * FLTRADIX ** exp The definition of FLTRADIX can be obtained by including . RETURN VALUE On success, these functions return x * FLTRADIX ** exp. If x is a NaN, a NaN is returned. If x is positive infinity (negative infinity), positive infinity (nega‐ tive infinity) is returned.

If x is +0 (-0), +0 (-0) is returned. If the result overflows, a range error occurs, and the functions return HUGEVAL, HUGEVALF, or HUGEVALL, respectively, with a sign the same as x. If the result underflows, a range error occurs, and the functions return zero, with a sign the same as x. ERRORS See matherror(7) for information on how to determine whether an error has occurred when calling these functions. The following errors can occur: Range error, overflow

An overflow floating-point exception (FEOVERFLOW) is raised. Range error, underflow

An underflow floating-point exception (FEUNDERFLOW) is raised. These functions do not set errno. VERSIONS These functions first appeared in glibc in version 2.1. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────┼───────────────┼─────────┤

│scalbn(), scalbnf(), scalbnl(), │ Thread safety │ MT-Safe │ │scalbln(), scalblnf(), scalblnl() │ │ │ └──────────────────────────────────┴───────────────┴─────────┘ CONFORMING TO

C99, POSIX.1-2001. NOTES These functions differ from the obsolete functions described in scalb(3) in the type of their second argument. The functions described on this page have a second argument of an integral type, while those in scalb(3) have a second argument of type double. If FLTRADIX equals 2 (which is usual), then scalbn() is equivalent to ldexp(3). SEE ALSO ldexp(3), scalb(3) COLOPHON

This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can

be found at http://www.kernel.org/doc/man-pages/.

2013-06-21 SCALBLN(3)




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