exists function returns true if an array index (or hash key) has been defined, and false if it has not. : exists « Array « Perl

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Perl » Array » exists

exists function returns true if an array index (or hash key) has been defined, and false if it has not.


   



#Format: exists $ARRAY[index];



#!/usr/bin/perl

@names = qw(Tom Raul Steve Jon);

print "Hello $names[1]\n", if exists $names[1];

print "Out of range!\n", if not exists $names[5];

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