CONSTANTS : ABAP Keyword a day

CONSTANTS

Variants

1. CONSTANTS c. … VALUE [ val | IS INITIAL ].
2. CONSTANTS c(len) … VALUE [ val | IS INITIAL ].
3. CONSTANTS: BEGIN OF crec,
…
END OF crec.

Effect
The CONSTANTS statement defines global and local constants. Constants allow you to read statically declared data objects . They always have a particular data type. Data types and data objects are essential components of the ABAP/4 type concept . In contrast to variables defined with the DATA statement, you cannot change the value of a constant once it has been defined. Apart from the additions … TYPE typ OCCURS n , … LIKE f1OCCURS n and WITH HEADER LINE , all the additions used with the DATA statement are allowed. However, in contrast to the DATA statement, the addition … VALUE val or VALUE IS INITIAL obligatory with variants 1 and 2. See additions with DATA .
Example

CONSTANTS CHAR1 VALUE ‘X’.

CONSTANTS INT TYPE I VALUE 99.

CONSTANTS: BEGIN OF CONST_REC,
C(2) TYPE I VALUE ‘XX’,
N(2) TYPE N VALUE ’12′,
X TYPE X VALUE ‘FF’,
I TYPE I VALUE 99,
P TYPE P VALUE 99,
F TYPE F VALUE ’9.99E9′,
D TYPE D VALUE ’19950101′,
T TYPE T VALUE ’235959′,
END OF CONST_REC.

———————
ABAPer, mail: abap.community@gmail.com http://www.erpdb.info

If you like this post, you may as well like these too:

1. AT : ABAP Keyword a day AT Events in lists- AT LINE-SELECTION.- AT USER-COMMAND.- AT PFn.Events on selection screens- AT SELECTION-SCREEN.Control break with extracts- AT NEW f.- AT END OF f.- AT FIRST.- AT LAST.- AT...
2. GET: ABAP Keyword a day GET: Event keyword for defining event blocks for reporting events. GET <node> [FIELDS <fi> <f 2>...]. GET node LATE [FIELDS f1 f2 ...]. Only occurs in executable programs. When the...
3. DO : ABAP Keyword a day DO Variants 1. DO. 2. DO n TIMES. Variant 1 DO. Addition … VARYING f FROM f1 NEXT f2 Effect Repeats the processing enclosed by the DO and ENDDO statements...
4. ASSIGN: ABAP Keyword a day ASSIGN Variants:1. ASSIGN f TO .2. ASSIGN (f) TO .3. ASSIGN TABLE FIELD (f) TO .4. ASSIGN LOCAL COPY OF MAIN TABLE FIELD (f) TO .5. ASSIGN COMPONENT idx OF...
5. FORM: ABAP Keyword a day FORM: Defines a subroutine. Syntax FORM [USING ... [VALUE(][)] [TYPE |LIKE ]„. ] [CHANGING... [VALUE(][)] [TYPE |LIKE ]„. ]. Introduces a subroutine. The USING and CHANGING additions define the subroutine’s...
6. FETCH : ABAP Keyword a day FETCH Basic form FETCH NEXT CURSOR c target. Effect Uses the cursor c to read the next line or lines from the dataset of a database table determined by OPEN...
7. DIVIDE : ABAP Keyword a day DIVIDE Basic form DIVIDE n1 BY n2. Effect Divides the contents of n1 by n2 and places the result in n1 . This is equivalent to: n1 = n1 /...
8. DESCRIBE : ABAP Keyword a day DESCRIBE Return attributes of a field - DESCRIBE FIELD f. Return attributes of an internal table - DESCRIBE TABLE itab. Determine distance between two fields - DESCRIBE DISTANCE BETWEEN f1...
9. DATA : ABAP Keyword a day DATA Variants1. DATA f.2. DATA f(len).3. DATA: BEGIN OF rec,…END OF rec.4. DATA: BEGIN OF itab OCCURS n,…END OF itab.5. DATA: BEGIN OF COMMON PART c,…END OF COMMON PART.EffectDefines global...
10. CONTINUE: ABAP Keyword a day CONTINUE Basic formCONTINUE.EffectWithin loop structures like * DO … ENDDO* WHILE … ENDWHILE* LOOP … ENDLOOP* SELECT … ENDSELECTCONTINUE terminates the current loop pass, returns the processing to the beginning...
11. CONCATENATE : ABAP Keyword a day CONCATENATE Basic form CONCATENATE f1 … fn INTO g. Addition … SEPARATED BY h Effect Places the fields f1 to fn after g . With the fields fi (1 <=...
12. COMPUTE: ABAP Keyword a day COMPUTEBasic formCOMPUTE n = arithexp.EffectEvaluates the arithmetic expression arithexp and places the result in the field n .Allows use of the four basic calculation types + , – , *...
13. CNT : ABAP Keyword a day CNT Basic form… CNT(h) …EffectCNT(h) is not a statement, but a field which is automatically created and filled by the system if f is a sub-field of an extract dataset...
14. CASE: ABAP Keyword a day CASE Basic formCASE f. Effect Case distinction.Depending on the current contents of a field, this statement executes one of several alternative processing branches. The field whose contents determine how the...
15. GET PARAMETER: ABAP Keyword a day GET PARAMETER Gets an SPA/GPA parameters. Syntax GET PARAMETER ID <pid> FIELD <field_name>. Writes the value of the SPA/GPA parameter <pid> from the user-specific SAP memory into the variable <f>....