How to Get Length of a Set in Perl - Step by Step Examples

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How to Get Length of a Set in Perl ?

Answer

To get the size of a set in Perl, you can use the scalar function on the array representing the set.

✐ Examples

1 Get Size of Set

In this example,

We create an array named @set1 with some elements.
We use the scalar function on the array @set1 to get the number of elements in the set.
The scalar function returns the size of the set.
Finally, we print the size of the set to standard output.

Perl Program

# Create a set
my @set1 = ('apple', 'banana', 'cherry');

# Get the size of the set
my $size = scalar @set1;

# Print the size
print "Size of set1: $size\n";

Output

Size of set1: 3

2 Get Size of Empty Set

In this example,

We create an empty array named @emptySet.
We use the scalar function on the array @emptySet to get the number of elements in the set.
Since the set is empty, the scalar function returns 0.
Finally, we print the size of the empty set to standard output.

Perl Program

# Create an empty set
my @emptySet = ();

# Get the size of the empty set
my $size = scalar @emptySet;

# Print the size
print "Size of emptySet: $size\n";

Output

Size of emptySet: 0

Summary

In this tutorial, we learned How to Get Length of a Set in Perl language with well detailed examples.

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