SAP ABAP Problems & Solution

How to add an input field in selection screen & using parameters : In Selection screen we can use Parameter for create a new selection screen. Syntax like: PARAMETERS : <FieldName> TYPE < Table -Field >.   PARAMETERS :  matnr  TYPE  makt - matnr .   Similarly using OBLIGATORY we can create a mandatory field.   PARAMETERS :  matnr  TYPE  makt - matnr oblicatory.   When we need to create a multiple range for input option then we use below syntax: SELECT-OPTIONS :  s_FieldName FOR <Table-Field> .   SELECT-OPTIONS :  s_matnr  FOR  makt - matnr .     Checkbox: For create a checkbox we used below syntax: Parameter: P_Field as checkbox.   Radio Button: Syntax is: PARAMETER: P_BUTTON AS RADIOBUTTON  GROUP xyz.