ABAP Round functionality to round values down to nearest value based on your decimal place requirement

The ABAP ROUND statement only rounds to nearest value whether it be up or down. 

data: ld_round type p DECIMALS 2 value '22.23',
      ld_result type p DECIMALS 2.
*Rounding using the ROUND ABAP statement
ld_result = round( val = ld_round dec = 2 ). "rounds ld_round to 2 decimal place
write: ld_result. "result = 22.26 as it is already at 2 decimal places
ld_result = round( val = ld_round dec = 1 ). "rounds ld_round to 1 decimal place
write: ld_result. "result = 22.30
ld_round = '22.23'.
ld_result = round( val = ld_round dec = 1 ). "rounds ld_round to 1 decimal place
write: ld_result. "result = 22.20

But sometimes you may want to always round your values down. So even if the start value is 22.29 you may still want the result to be 22.2. Therefore the following ABAP code demonstrates how to always round a number DOWN, the exmaple shows hopw to do it from 2 decimal places to 1 dp but its the same for different variations.

Also see here for how to Round values up 


*Rounds a value DOWN to 1 decimal using function module 'ROUND'
DATA: dec2 TYPE p DECIMALS 2 VALUE '22.23',
      dec1 TYPE p DECIMALS 1,
      ld_str(50) TYPE c.
CALL FUNCTION 'ROUND'
  EXPORTING
    decimals      = 1
    input         = dec2
    sign          = '-'  "Negative Rounding Concept
  IMPORTING
    output        = dec1 "result will be 22.2
  EXCEPTIONS
    input_invalid = 1
    overflow      = 2
    type_invalid  = 3
    OTHERS        = 4.



*Rounds a value DOWN to 1 decimal using char manipulation
DATA: dec2 TYPE p DECIMALS 2 VALUE '22.23',
      dec1 TYPE p DECIMALS 1,
      ld_str(50) TYPE c.
ld_str = dec2.
SHIFT ld_str RIGHT DELETING TRAILING ' '.
SHIFT ld_str RIGHT BY 1 PLACES.
SHIFT ld_str LEFT DELETING LEADING ' '.
dec1 = ld_str.  "result will be 22.2

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