Data Types

Definition:

Data Types are diffrent kinds of information that may appear in the C/SIDE Environment.

Different data types having different values and each of them having diffrent way of representation. 

Example:

If we have two data types "12" and "36" and add them, we will get different values according to different data types. ie, If they are numbers then the result would be 48 and on the other hand if we consider these are text then the result would be "1236" only.

Data Types can be mainly divided in to 4 types

1. Simple Datatypes
2. Numeric Data Types
3. String Data Types
4. Boolean, Date and Time

• Simple Datatypes: Simple data types are those types of data which have only one value and which cannot be broken up into other values of different types.                                                    
• Numeric Data ypes: Numeric Data Types are all forms of numbers or amounts.

TYPE	RANGE	SIZE	EXAMPLE	DEFAULT VALUE
Integer	From 2,147,483,647 to + 2,147,483,647	4 Bytes	12 1000 -100 0	0
Decimal	From -1X10^63(1 followed by 63 zeros) to + 2,147,483,647	12 Bytes	12.50 -2.0 0.008	0
Option			Red, Orange, yelow, Green, Blue, Indigo, Violet Where 0 is Red and 3 is Green	0
Char	0-255	1 Bytes	'b' 'C' '3' '?'

• 
  String Data Types: 
  

TYPE	RANGE	SIZE	EXAMPLE
Text	From 0 to + 250	add one to the length and round up to the nearest four. Thus and 8 char text takes up to 12 bytes (1+8 round up to the nearest 4)	"Hello" '127.50'
Code All Letters are forced to upper case and all leading and  trailing spaces are removed.		add 2 to the length and round up to the nearest 4. Thus an 11 character code  takes up 16 bytes (2+11 round up to the nearesr 4)	'HELLO' '127.50'

• Boolean, Date and Time

TYPE	RANGE	SIZE	EXAMPLE
Boolean		1 Byte in memory only	TRUE FALSE
Date	1/1/0000 through 12/31/9999	4 Bytes	0D (The undefined date, less than all other dates) 123197D (Dec 31 1997)
Time	00:00:00through23:59:59:999	4 Bytes	1030000T (10:30am) 0T(The undefined time, less than all other times)