Here am reading the file directly but my query is how to readd the file with the standard input word given. 
open F, "<file.txt" or die $!;
while (<F>) {
    print $_;
}
close F;

[download]
File.txt
data1
data2
data3
data4

[download]

How should my output works which as follows
Enter the name:data1(Here i give data1 the word is present in the file.txt).So now it should read entire file.txt
Incase if i give data5 as standard input there is no word in the file.txt then the print statement should show name is not present in the file.txt.
Now my query is i dont know how to give standard input and from standard input how to read the file.
How can i do it?.

In reply to How to read the file from stdin using perl? by gopikavi

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