Include in Perl

In Perl, the in operator is used to check whether an array includes a specific element. Here is an example:

@array = (1,2,3,4,5);
if (3 in @array) {
  print "Element 3 exists in the array";
}

In this example, we declare an array @array with values 1,2,3,4,5. Then we use the in operator to check if the element 3 exists in the array. If it does, the program will print "Element 3 exists in the array".

Similarly, you can also use the grep function in Perl to check if an array includes an element. Here is an example:

@array = (1,2,3,4,5);
if (grep /^3$/, @array) {
  print "Element 3 exists in the array";
}

In this example, we use the grep function to search for the element 3 in the array @array. If the element exists, the function will return the value, which evaluates to true and the program will print "Element 3 exists in the array".