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0 Command: ilogb | Section: 3 | Source: OpenBSD | File: ilogb.3
ILOGB(3) FreeBSD Library Functions Manual ILOGB(3) NAME ilogb, ilogbf, ilogbl - extract exponent SYNOPSIS #include <math.h> int ilogb(double x); int ilogbf(float x); int ilogbl(long double x); DESCRIPTION ilogb() returns x's exponent n, in integer format. ilogb(+-infinity) returns INT_MAX, ilogb(NaN) returns FP_ILOGBNAN and ilogb(0) returns FP_ILOGB0. The ilogbf() function is a single precision version of ilogb(). The ilogbl() function is an extended precision version of ilogb(). SEE ALSO ffs(3), frexp(3) STANDARDS IEEE Std 754-1985 HISTORY The ilogb, ilogbf and ilogbl functions appeared in 4.3BSD, NetBSD 1.1 and OpenBSD 4.5, respectively. FreeBSD 14.1-RELEASE-p8 October 31, 2020 FreeBSD 14.1-RELEASE-p8

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