fpclassify

Classify a floating-point number.

תקציר

use POSIX qw(fpclassify FP_NAN FP_INFINITE FP_ZERO FP_SUBNORMAL FP_NORMAL);
my $k = fpclassify($x);

מה מוחזר

An integer matching one of the FP_* constants. Compare against the symbolic names, not a hardcoded number - the values are libc implementation details.

הבדלים מן ה-upstream

Fully compatible with upstream POSIX.

ראו גם

• isnan, isinf, isfinite, isnormal - narrower single-class tests.