Data Types

 The following predefined data types are used in ABAP programs:

1. Predefined ABAP types
2. Generic ABAP types

Predefined ABAP types: (Complete Types):

Predefined data types also known as complete data type. Complete data type are not generic .Following table illustrate the complete data types.

Properties

Type	Name	Length
d	Date	8 byte
T	Time	6 byte
i	Integer	4 byte
Int8	Integer	8 byte
decfloat16	Decimal floating point number with 16 places	8 byte
f	Binary floating point number with 17 places	8 byte
decfloat34	Decimal floating point number with 34 places	16 byte
String	String	Variable
XString	Byte String	Variable

Predefined Numeric Types:

The data objects of the numeric data types are used to handle number values.

Properties

Type	Name	Length
b	1-byte integer (internal)	1 byte
s	2-byte integer (internal)	2 byte
i	4-byte integer	4 byte
int8	8-byte integer	8 byte
p	Packed number	1 to 16 bytes
decfloat16	Decimal floating point number with 16 places	8 byte
decfloat34	Decimal floating point number with 34 places	16 byte
f	Binary floating point number with 17 places	8 byte

Generic ABAP Types :( Incomplete Data Types):

A generic data type is an incomplete type specification that includes multiple complete type specifications.

Type	Description
any	Any data type
any table	Internal table with any table category
c	Text field with a generic length
clike	Character-like (c, n, and string plus the date/time types d, t and character-like flat structures)
csequence	Text-like (c, string)
data	Any data type
decfloat	Decimal floating point number (decfloat16, decfloat34)
hashed table	Hashed table
index table	Index table
n	Numeric text with generic length
numeric	Numeric ((b, s), i, int8, p, decfloat16, decfloat34, f)
object	Any object type (root class of the inheritance hierarchy)
p	Packed number with generic length and generic number of decimal places
simple	Elementary data type including structured types with exclusively character-like flat components
sorted table	Sorted table
standard table	Standard table
table	Standard table
x	Byte field with generic length
xsequence	Byte-like (x, xstring)

  Following Figure illustrate data  types: