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To print text to a file, including to STDOUT, you use the print function.
The print function has these forms:
print FILEHANDLE LIST
print LIST
print
If you don't specify a file handle, STDOUT is used.
If you don't specify a list of items to print, the print function prints whatever is in the special Perl variable $_ to the output channel.
The $_ variable is the default variable that holds input from the input channel.
print "Hello!\n";
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