Table Reductions, Summation of an Array - ABAP Keyword Documentation

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Table Reductions, Summation of an Array

This example demonstrates a simple table reduction using REDUCE.

Source Code

REPORT demo_reduce_simple.

CLASS demo DEFINITION.
  PUBLIC SECTION.
    CLASS-METHODS main.
ENDCLASS.

CLASS demo IMPLEMENTATION.
  METHOD main.
    DATA itab TYPE TABLE OF i WITH EMPTY KEY.
    itab = VALUE #( FOR j = 1 WHILE j <= 10 ( j ) ).
    cl_demo_output=>write( itab ).

    DATA(sum) = REDUCE i( INIT x = 0 FOR wa IN itab NEXT x = x + wa ).
    cl_demo_output=>write( sum ).

    cl_demo_output=>display( ).
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  demo=>main( ).

Description

After the FOR expression, the content of the table rows in itab is added to the local variable x and this variable is provided as the result. Instead of x = 0, x TYPE i could also be specified after INIT.