grep « Regular Expression « Perl

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Perl » Regular Expression » grep 
1.grep value
2.grep with regular rxpression
3.grep {$_ *= 2}
4.Using grep function
5.Using grep to remove word
6.Using grep with expression
7.Using grep with the file-test operators.
8.The grep function evaluates the expression (EXPR) for each element of the array (LIST).
9.grep function with regular expression
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