How to check if a Perl array contains a particular value

Overview

In Perl, an array is a special type of variable that is used to store a list of elements.

There are multiple ways to check if an array contains a particular value. In this shot, we will use grep().

The grep() method

The method uses regexregular expression is a sequence of characters that specifies a search pattern in text to check if the given value is present in the given array.

Syntax

grep( /^$value$/, @nums )
Syntax of grep() function

Parameters

It takes two parameters value and array.

  • value: Provides value to search for.
  • array: Provides array to search in.

Return value

It returns a boolean value.

Example

In the following example, we will check if the given value 90 is present in the given array nums or if it's using grep().

Code

#provide nums array
@nums = (10, 20, 30, 40 , 50);
#provide value to search
my $value = 90;
#check if array contains given value
if ( grep( /^$value$/, @nums ) ) {
  print "The given value contains in the array";
}else{
  print "The given value does not contain in the array";
}

Explanation

In the code snippet above:

  • In Line 2: We declare and initialize the array nums.
  • In Line 5: We declare and initialize the value to search in the array.
  • In Line 8: We check if the given value is present in the given array using grep(). We will provide the output statement according to the return value from grep().

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