How to check if a Specific Item is present in the Set in Perl - Step by Step Examples

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How to check if a Specific Item is present in the Set in Perl ?

Answer

To check if a specific item is present in a Set in Perl, you can use the exists function.

✐ Examples

1 Check if Item is Present

In this example,

We define a Set named %my_set containing elements of a specific type.
We use the exists function to check if a specific item is present in the Set.
The exists function returns 1 if the item is present in the Set, otherwise it returns undef.
Finally, we print the result to standard output.

Perl Program

# Define Set with items
my %my_set = ("apple" => 1, "banana" => 1, "orange" => 1, "grape" => 1, "melon" => 1);

# Check if item is present
my $item = "banana";
my $is_present = exists $my_set{$item};

# Print result
print "Is $item present in the Set? ", $is_present ? "true" : "false", "\n";

Output

Is banana present in the Set? true

2 Check if Item is Not Present

In this example,

We define a Set named %my_set containing elements of a specific type.
We use the exists function to check if a specific item is not present in the Set.
The exists function returns undef if the item is not present in the Set.
Finally, we print the result to standard output.

Perl Program

# Define Set with items
my %my_set = ("apple" => 1, "banana" => 1, "orange" => 1, "grape" => 1, "melon" => 1);

# Check if item is not present
my $item = "peach";
my $is_not_present = !exists $my_set{$item};

# Print result
print "Is $item not present in the Set? ", $is_not_present ? "true" : "false", "\n";

Output

Is peach not present in the Set? true

Summary

In this tutorial, we learned How to check if a Specific Item is present in the Set in Perl language with well detailed examples.

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