fpclassify

Classify a floating-point number.

Σύνοψη

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

Τι επιστρέφεται

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

Διαφορές από το upstream

Fully compatible with upstream POSIX.

Δείτε επίσης

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