Language Fundamentals

Language Fundamentals

1. ASCII (American Standard Code for Information Exchange)

   • Represents alphanumeric characters by 7 bits

2. Unicode: attempts to include all characters in all languages by using 16 bits, increased to 32

   • 32 bits is not efficient. Character encoding make it efficient: UTF-8(16,32)

3. Several types of seperators with different uses: (), {}, [], etc.

4. Primitive is another data type: byte, short, int, float, double, char, boolean

5. Variables are placeholders. Two types: reference and primitive

   • Constant: varaible whos values cannot be chagned, denoted by "final"
   • Source code representation of a fixed value: Literal
     • Literals of primitive types, string, and null literals