Parameters in ABAP

 

  • Parameters keyword allows the user to provide values for variables through the input screen.
  • The input screen can be generated by the keywords Parameters or Select-options.
  • Technically input screen is known as Selection Screen. It's screen number is standard and is 1000.
Ex. PARAMETERS A TYPE I.

PARAMETERS file_name(40) TYPE C DEFAULT 'c:sample.txt'.
  • The data types F(Float), STRING and XSTRING are not allowed with parameters.

Parameters keyword can be used to generate Check boxes and Radio buttons on the selection screen.

  • A check box or a radio button is always identified programmatically as single character variables.
  • if a check box or radio button is selected by the user then the corresponding variable contains value 'X' otherwise a SPACE.
  • SPACE is keyword in ABAP that represents a single space character.

Logically related radio buttons must be grouped together.

Example:

PARAMETERS CH TYPE C AS CHECKBOX.

PARAMETERS RB1 TYPE C RADIOBUTTON GROUP G1.

PARAMETERS RB2 TYPE C RADIOBUTTON GROUP G1.

PARAMETERS RB3 TYPE C RADIOBUTTON GROUP G1.
  • The length of a parameter or select-option must not exceed 8 characters.
  • On the selection screen, user defined text can be displayed in place of parameters and select-options names. These texts are known as Selection texts.
  • To provide selection texts for selection screen elements use the menu path

Goto -> Text Elements -> Selection Texts

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