Novice self-taught ABAP (1)--Data type

One, the data statement

1.TYPE TYPE

Ex: You can declare multiple variables with a colon.

　　DATA: gv_num1 TYPE I,

Gv_num2 TYPE I.

2.LIKE Num (num can be a variable of any data type-field, parameter, struct, system variable, etc.)

Ex

　　DATA: gv_num3 like Gv_num1.

3.VALUE int

If you use the value is initial statement, the initial value of the variable is the initial value of the referenced data type.

However, when defining a fixed value, be sure to define its initial value using the value statement.

DATA: gv_num TYPE i value 123,

Gv_flag value ' X ',

Gv_val Value is initial,

Gv_idx like Sy-tabix value 45.

4LRNGTH N

Used to specify the field length, but only for C, N, P, x types

DATA: gv_num TYPE n LENGTH 2.

5.DECIMALS N

Decimals n is used to specify 1~14 decimal places only for data type P

DATA: gv_num TYPE P decimals 3.

Novice self-taught ABAP (1)--Data type