Data Type Perl

Type                     Format               Example
Integer                  NN                   12
Floating point           NN.NN                342.176
Scientific               NN.NNENN             42.04E-6
Big number               NN_NNN_NNN           6_000_000
Hexadecimal              0xNNNN               0xFFD3
Octal                    0NNN                 0374