# Currency conversions

In this article I’d like to show an easy approach on how to convert an amount given in one currency to another currency and warn you before a possible bug in SAP standard FM used for currency conversions.

```DATA:
l_in(15) TYPE p DECIMALS 5,
l_out(15) TYPE p DECIMALS 5.

l_in = 1.

CALL FUNCTION 'CONVERT_TO_LOCAL_CURRENCY'
EXPORTING
date             = sy-datum
foreign_amount   = l_in
foreign_currency = 'EUR'
local_currency   = 'DKK'
IMPORTING
local_amount     = l_out
EXCEPTIONS
no_rate_found    = 1
overflow         = 2
no_factors_found = 3
derived_2_times  = 5
OTHERS           = 6.
IF sy-subrc = 0.
WRITE: l_in, 'EUR = ', l_out, 'DKK'.
ENDIF.```

Result of the program is:

IMPORTANT NOTE (valid at 2014-05-27): It is VERY important to use variables defined equally – having the same precision/decimal places and length. Otherwise the results might be VERY surprising: check the following modification with different decimal precision on INPUT and OUTPUT

```DATA:
l_in(15) TYPE p DECIMALS 5,
l_out(15) TYPE p DECIMALS 3.
l_in = 1.

CALL FUNCTION 'CONVERT_TO_LOCAL_CURRENCY'
EXPORTING
date             = sy-datum
foreign_amount   = l_in
foreign_currency = 'EUR'
local_currency   = 'DKK'
IMPORTING
local_amount     = l_out
EXCEPTIONS
no_rate_found    = 1
overflow         = 2
no_factors_found = 3
derived_2_times  = 5
OTHERS           = 6.

IF sy-subrc = 0.
WRITE: l_in, 'EUR = ', l_out, 'DKK'.
ENDIF.

```

Result of the second example:

Original of the article is at my blog (oprsteny.com)

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The reason behind this surprising result is the mysterious attribute "Fixed point arithmetic".

If you'll check the properties of function group SCUN, you may see that "Fixed point arithmetic" isn't checked (like in several ancient source codes). In such case, packed numbers behaves "unexpectedly".

Hope it unravel the mystery...