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ABAP Keyword Documentation →  ABAP - Reference →  Program Flow →  Control Structures →  Loops 


Short Reference

Other versions: 7.31 | 7.40 | 7.54


DO [n TIMES]. 


Unconditional loop. The DO and ENDDO statements define a control structure that can contain a closed statement_block statement block.

Without the n TIMES addition, the statement block is repeated until it is exited with one of the statements for exiting loops. The DS:ABAP.EXIT_LOOP>EXIT statement, in particular, is intended for exiting loops completely. Within the statement block, the sy-index system field contains the number of previous loop passes (including the current loop). In nested loops, sy-index always refers to the current loop.

With the n TIMES addition, you can limit the number of loop passes. n is a numerical expression position of operand type i.

The numerical value that n has at the point of entry into the loop determines how often the statement block can be executed. The control structure does not take into account changes to value n within the loop. If n contains a value less than or equal to 0, the statement block is not executed.


If the n TIMES addition is not specified, the loop must be exited with a statement; otherwise, the loop is processed endlessly. The profile parameter rdisp/max_wprun_time limits the maximum execution time of an ABAP program.

  • The obsolete addition VARYING can be used to process a sequence of data objects in the memory.


Calculation and output of the first ten square numbers in a DO loop.

DATA square TYPE i. 

  square = sy-index ** 2. 
  WRITE: / sy-index, square.