The syntax used in Perl is
grep BlOCK LIST
grep ( EXPR, LIST )
BLOCK : It contains one or more statements delimited by braces, the last statement determines in the block whether the block will be evaluated true or false.
EXPR : It represents any expression that supports $, particularly a regular expression. Against each element of the list, expression is applied, and if the result of the evaluation is true, the current element will be attached to the returned list
LIST : It is a list of elements or an array
