ABAP Integer Types: I, INT1, INT2, INT4 Explained

In SAP ABAP, integer data types are used to store whole numbers. The main integer data types in ABAP are:

1. I (Integer)

• Type: Fixed-length, signed 4-byte (32-bit) integer
• Value Range: -2,147,483,648 to +2,147,483,647
• Example declaration:

DATA lv_int TYPE I.
lv_int = 100.

2. INT1 (1-byte integer, Tiny Integer)

• Type: Unsigned 1-byte (8-bit) integer
• Value Range: 0 to 255
• Example declaration:

DATA lv_int1 TYPE INT1.
lv_int1 = 200.

3. INT2 (2-byte integer, Small Integer)

• Type: Signed 2-byte (16-bit) integer
• Value Range: -32,768 to +32,767
• Example declaration:

DATA lv_int2 TYPE INT2.
lv_int2 = 30000.

4. INT4 (4-byte integer, Standard Integer)

• Equivalent to I type (32-bit integer)
• Example declaration:

DATA lv_int4 TYPE INT4.
lv_int4 = 200000.

Additional Notes:

• No INT8 in Standard ABAP: ABAP does not have an 8-byte integer (INT8). Instead, you can use DECFLOAT or P (Packed Number) for larger numbers.
• Conversion Considerations: Be careful when converting between integer types to avoid overflow errors.