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9 lines
375 B
Perl
9 lines
375 B
Perl
#If a scalar has neither a valid string nor a valid numeric value, it is undefined.
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#The defined function checks for the validity of a variable's value.
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#defined Function returns 1 if the variable has a value and null if it does not.
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#defined Function also checks the validity of arrays, subroutines, and null strings.
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$name="A";
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print "OK \n" if defined $name;
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