reading a file to the end regardless of result

is there a command to continue with a process even if the last line didn't
have the value you were after?

ie if I was reading each line in a file and placing the output on the
console, and I wanted to continue even if there were some whitespaces what
would I have to amend in this prog:

open(file, "file.txt");

while( )
{
my $filevalue = <file>;

print $filevalue;
}


.

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