This is Perl enough to be dangerous.
1-Scalar_Data/
- 1.pl: Scalar Data
- 2.pl: Numbers
- 3.pl: All Numbers Have the Same Format Internally
- 4.pl: Floating-Point Literals
- 5.pl: Integer Literals
- 6.pl: Nondecimal Integer Literals
- 7.pl: Numeric Operators
===
2-Strings/
- 1.pl: Strings
- 2.pl: Single-Quoted String Literals
- 3.pl: Double-Quoted String Literals
- 4.pl: String Operators
- 5.pl: Automatic Conversion Between Numbers and Strings
===
3-Buil-in_Warnings/
- 1.pl: Perl’s Built-in Warnings
===
4 - Scalar_Variables/
- 1.pl: Scalar Variables
- 2.pl: Choosing Good Variable Names
- 3.pl: Scalar Assignment
- 4.pl: Binary Assignment Operators
===
5 - Print/
- 1.pl: Output with print
- 2.pl: Interpolation of Scalar Variables into Strings
- 3.pl: Creating Characters by Code Point
- 4.pl: Operator Precedence and Associativity
- 5.pl: Comparison Operators