my $foo = 'bar';

print <<END;
1. \$foo is $foo
END

print <<"END";
2. \$foo is $foo
END

print <<'END';
3. \$foo is $foo
END

print <<`END`;
echo 4. \$foo is $foo
END

[download]
results in 
1. $foo is bar
2. $foo is bar
3. \$foo is $foo
4. $foo is bar

[download]
See perlop#Quote-and-Quote-like-Operators.

In reply to Re^4: assign a string using multiline format by chibiryuu
in thread assign a string using multiline format by danmcb

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