Scalar data types
Cs3430 lecture 17
11.1 Variable types in PERL ScalarArrayHash $number -3.54 $string "hi\n" @array %hash $array[0] $hash{key}
9.1 Hash revision. 9.2 Variable types in PERL ScalarArrayHash $number -3.54 $string "hi\n" @array %hash => $array[0] $hash{key}