doc here example

$Price = "5 rupees";

print <<EOF;        # same as above
The price is $Price.
EOF

print <<"EOF";        # same as above
The price is $Price.
EOF

print << x 10;        # null identifier is delimiter
Merry Christmas!

print <<`EOC`;        # execute commands
echo hi there
echo lo there
EOC

#print <<FOO, <<BAR;    # you can stack them
#I said foo.
#FOO
#I said bar.
#BAR