what is abs, sign, floor, ceil, trunc and frac in abap

Functionfunc	Return value
abs	Absolute value of argument arg
sign	Sign of argument arg: -1, if the value of arg is negative; 0, if the value of arg is 0; 1, if the value of arg is positive
ceil	Smallest integer that is not less than the value of the argument arg is
floor	Largest integer that is not greater than the value of the argument arg is
trunc	Value of the integer part of the argument arg
frac	Value of the decimal places of the argument arg

DATA n TYPE p DECIMALS 2.
DATA M TYPE p DECIMALS 2 VALUE '-3.55'.
n = ABS( M ).  WRITE:  'ABS: ', n.
n = SIGN( M ). WRITE: / 'SIGN: ', n.
n = CEIL( M ). WRITE: / 'CEIL: ', n.
n = FLOOR( M ). WRITE: / 'FLOOR:', n.
n = TRUNC( M ). WRITE: / 'TRUNC:', n.
n = FRAC( M ). WRITE: / 'FRAC: ', n.

output: 

ABS:               3.55

SIGN:              1.00-

CEIL:              3.00-

FLOOR:          4.00-

TRUNC:          3.00-

FRAC:             0.55-

Convert csv file and send to ftp server

DATA: IT_FTP TYPE STANDARD TABLE OF ZFTPSERVERLIST ,
      WA_FTP TYPE ZFTPSERVERLIST,
      L_SLEN TYPE I,
      LV_USER(30) TYPE C,
      LV_PWD(30) TYPE C,
      C_KEY TYPE I VALUE 26101957.

DATA: TO_FILE TYPE CHAR300.
DATA: MI_HANDLE TYPE I.

DATA: itab1  TYPE truxs_t_text_data.

PERFORM CONVERT_TO_CSV.
PERFORM SERVER_CONN.
PERFORM R3_FTP USING TO_FILE.

FORM convert_to_csv .

  CALL FUNCTION 'SAP_CONVERT_TO_TEX_FORMAT'
  EXPORTING
    i_field_seperator    = ','
    I_LINE_HEADER        = 'X'
  TABLES
    i_tab_sap_data       = ITAB[] " final file
    "FIELDNAMES           = T_DESC  " for header file
  CHANGING
    i_tab_converted_data = itab1[]
  EXCEPTIONS
    conversion_failed    = 1
    OTHERS               = 2.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
    WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.

ENDFORM.

FORM r3_ftp  USING    p_to_file.
  """"" SEND FILE TO SERVER""""""
  CALL FUNCTION 'FTP_R3_TO_SERVER'
  EXPORTING
    HANDLE         = MI_HANDLE
    FNAME          = TO_FILE          "file path of destination system
    CHARACTER_MODE = 'X'
  TABLES
    TEXT           = itab1
  EXCEPTIONS
    TCPIP_ERROR    = 1
    COMMAND_ERROR  = 2
    DATA_ERROR     = 3
    OTHERS         = 4.

  IF sy-subrc <> 0.
    WRITE : / 'FILE NOT SEND'.
  ELSE.
    WRITE : / 'FILE SEND'.
  ENDIF.

ENDFORM.

FORM server_conn .

  SELECT * FROM ZFTPSERVERLIST CLIENT SPECIFIED
  INTO CORRESPONDING FIELDS OF TABLE IT_FTP
  WHERE MANDT = SY-MANDT
  AND   ZCOUNTRY = 'BD'.

  CLEAR WA_FTP.
  READ TABLE IT_FTP INTO WA_FTP INDEX 1.

*----CONNECTING TO FTP SERVER.
  PERFORM FTP_CONNECT USING WA_FTP-ZUSER WA_FTP-ZPASSWD WA_FTP-ZHOST.

*----CHECKING SUCCESSFUL FTP CONNECTION
  CHECK SY-SUBRC = 0.
  CLEAR: TO_FILE.
  " FILE NAME CREATIONN
  CONCATENATE WA_FTP-zapp 'test' '_' DATE '.csv' INTO TO_FILE.

ENDFORM.


FORM ftp_connect  USING   LV_USER LV_PWD LV_HOST.

  L_SLEN = STRLEN( LV_PWD ).

  CALL FUNCTION 'HTTP_SCRAMBLE'
  EXPORTING
    SOURCE      = LV_PWD
    SOURCELEN   = L_SLEN
    KEY         = C_KEY
  IMPORTING
    DESTINATION = LV_PWD.

  CALL FUNCTION 'FTP_CONNECT'
  EXPORTING
    USER            = LV_USER "Your SAP-UNIX FTP user name (case sensitive)
    PASSWORD        = LV_PWD  "Your SAP-UNIX server host name (case sensitive)
    HOST            = LV_HOST
    RFC_DESTINATION = 'SAPFTPA'
  IMPORTING
    HANDLE          = MI_HANDLE
  EXCEPTIONS
    NOT_CONNECTED   = 1
    OTHERS          = 2.

ENDFORM.

How to read data from schedule job

DATA: JOBNAME TYPE TBTCO-JOBNAME.
DATA: JOBCOUNT TYPE TBTCO-JOBCOUNT.
DATA: LISTIDENT TYPE TBTCPV-LISTIDENT.
DATA: JOBNO TYPE TSP01-RQIDENT.
DATA: DATE TYPE C LENGTH 12.

DATA: flag TYPE I.

DATA: BEGIN OF i_outtab OCCURS 0,
  str(255) TYPE C,
END OF i_outtab.


DATA: BEGIN OF BUFFER OCCURS 100000,
  TEXT(6000) TYPE C,
END OF BUFFER.

DATA: startline TYPE I, endline TYPE I.

" GETTING DATE WISE SPOOL NUMBER

SELECT SINGLE JOBCOUNT FROM TBTCO INTO JOBCOUNT WHERE JOBNAME = 'job_name' AND SDLSTRTDT = SY-DATUM.

SELECT SINGLE LISTIDENT FROM TBTCPV INTO LISTIDENT WHERE JOBCOUNT = JOBCOUNT AND JOBNAME = 'job_name' .

CONCATENATE SY-DATUM+6(2) SY-DATUM+4(2) SY-DATUM+0(4) INTO DATE SEPARATED BY '_'.
JOBNO = LISTIDENT.

IF JOBNO NE '0'.
  " FETCHING SPOOL DATA TO BUFFER
  startline = 1.

  DO.
    REFRESH BUFFER.
    endline = startline + 99999.
    CALL FUNCTION 'RSPO_RETURN_SPOOLJOB'
    EXPORTING
      rqident              = JOBNO
      first_line           = startline
      last_line            = endline
      desired_type         = 'RAW'
  
    TABLES
      BUFFER               = BUFFER
    EXCEPTIONS
      no_such_job          = 1
      job_contains_no_data = 2
      selection_empty      = 3
      no_permission        = 4
      can_not_access       = 5
      read_error           = 6
      type_no_match        = 7
      OTHERS               = 8.
    IF sy-subrc <> 0.
      EXIT.
    ENDIF.

    LOOP AT BUFFER.
      i_outtab-str = BUFFER-TEXT.
      APPEND i_outtab.
      CLEAR i_outtab.
    ENDLOOP.
    startline = endline + 1.
  ENDDO.

EXIT, STOP, CONTINUE, RETURN and LEAVE PROGRAM

EXIT: The EXIT command will stop the LOOP passings, exit from the SUBROUTINES..etc.

The behavior of EXIT keyword is depends on where you use it.

• If you use EXIT keyword inside IF .. ENDIF., it will comes out of the program.
• If you use EXIT inside LOOP .. ENDLOOP., it will come out of loop.
• If you use EXIT inside FORM .. ENDFORM., it will comes out of form (subroutine)

Leave Program : LEAVE PROGRAM always leaves the current program - there is never any processing after LEAVE PROGRAM 

STOP

STOP is a statement which is used to stop processing an event block, ex: If I have two events START-OF-SELECTION and END-OF-SELECTION in my program, If I use STOP keyword in START-OF-SELECTION, the keyword will exits start-of-selection and goes to END-OF-SELECTION.

CONTINUE

CONTINUE is a statement, which is used to skip execution of a record inside loop.. endloop, do..endo, while..endwhile etc. 

RETURN

RETURN is a statement which is used to stop processing of current block immediately.