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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" Scalar::Util::Numeric \- numeric tests for Perl scalars .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& use Scalar::Util::Numeric qw(isnum isint isfloat); \& \& foo($bar / 2) if (isnum $bar); \& \& if (isint $baz) { \& # ... \& } elsif (isfloat $baz) { \& # ... \& } .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" This module exports a number of wrappers around perl's builtin \f(CW\*(C`grok_number\*(C'\fR function, which returns the numeric type of its argument, or 0 if it isn't numeric. .SH "TAGS" .IX Header "TAGS" All of the functions exported by Scalar::Util::Numeric can be imported by using the \f(CW\*(C`:all\*(C'\fR tag: .PP .Vb 1 \& use Scalar::Util::Numeric qw(:all); .Ve .SH "EXPORTS" .IX Header "EXPORTS" .SS "isnum" .IX Subsection "isnum" .Vb 1 \& isnum ($val) .Ve .PP Returns a nonzero value (indicating the numeric type) if \f(CW$val\fR is a number. .PP The numeric type is a conjunction of the following flags: .PP .Vb 6 \& 0x01 IS_NUMBER_IN_UV (number within UV range \- not necessarily an integer) \& 0x02 IS_NUMBER_GREATER_THAN_UV_MAX (number is greater than UV_MAX) \& 0x04 IS_NUMBER_NOT_INT (saw . or E notation) \& 0x08 IS_NUMBER_NEG (leading minus sign) \& 0x10 IS_NUMBER_INFINITY (Infinity) \& 0x20 IS_NUMBER_NAN (NaN \- not a number) .Ve .SS "isint" .IX Subsection "isint" .SS "isuv" .IX Subsection "isuv" .SS "isbig" .IX Subsection "isbig" .SS "isfloat" .IX Subsection "isfloat" .SS "isneg" .IX Subsection "isneg" .SS "isinf" .IX Subsection "isinf" .SS "isnan" .IX Subsection "isnan" The following flavours of \f(CW\*(C`isnum\*(C'\fR (corresponding to the flags above) are also available: .PP .Vb 7 \& isint \& isuv \& isbig \& isfloat \& isneg \& isinf \& isnan .Ve .PP \&\f(CW\*(C`isint\*(C'\fR returns \-1 if its operand is a negative integer, 1 if it's 0 or a positive integer, and 0 otherwise. .PP The others always return 1 or 0. .SH "SEE ALSO" .IX Header "SEE ALSO" .IP "\(bu" 4 \&\*(L"type\*(R" in autobox .IP "\(bu" 4 Data::Types .IP "\(bu" 4 Params::Classify .IP "\(bu" 4 Params::Util .IP "\(bu" 4 Scalar::Util .IP "\(bu" 4 String::Numeric .SH "VERSION" .IX Header "VERSION" 0.22 .SH "AUTHORS" .IX Header "AUTHORS" .IP "\(bu" 4 chocolateboy .IP "\(bu" 4 Michael G Schwern .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright (c) 2005\-2010, chocolateboy. .PP This module is free software. It may be used, redistributed and/or modified under the same terms as Perl itself.