- Exchange table
- Rounding difference
In french: eVersDevise
Converts a value expressed in Euro into another currency.
: In browser code, eToCurrency
is used to perform approximate calculations without refreshing the page beside the server (save time during the Internet connections). The precision of the calculations performed in browser code does not correspond to the Euro standard. To perform precise calculations, we advise you to send the page back to the server and to perform the calculations in a server code.
// Convert Euros into Marks
ResConversion = eToCurrency(150, eDEM)
<Result> = eToCurrency(<Value to convert> [, <Destination currency> [, <Number of decimals>]])
Value converted into the specified currency.
This parameter is a real.
<Value to convert>: Currency
Amount in Euros to convert.
This parameter is a real.
<Destination currency>: Integer or constant (optional)
Identifier of the destination currency or constant associated with the destination currency. If this parameter is not specified, the function converts the specified value into the currency whose identifier is "1" (the French Franc by default).
<Number of decimals>: Optional integer
Number of decimal places used for the result of the conversion (2 by default).
An exchange table is stored in memory. Each currency is associated with:
- A currency number used to identify the currency by programming.
- A constant used to identify the currency by programming.
- A caption (up to 7 characters): this caption is displayed in the "Currency + Euro" control if the input mask allows it (the $ sign is indicated).
- An exchange rate. This exchange rate corresponds to the exchange rate of the currency in relation to the Euro.
This exchange table is as follows:
|Currency number||Constant||Country||Exchange rate||Default caption|
|Currencies not taking part in the Euro|
|16 - 25|| ||0||Free1 to Free10|
The first currency (whose identifier is set to 0) is the currency used as reference for the conversions.
In this exchange table, you have the ability to:
- add new currencies by modifying the custom currencies if necessary ("user-defined currencies" from 16 to 25) with eInitCurrency,
- specify the exchange rate of each currency with eInitCurrency.
: The currencies whose exchange rate is set to 0 will not be displayed in the popup menu of the "Currency + Euro" control. To define the exchange rate of these currencies, you must redefine them in the initialization code of the project with eInitCurrency
The <Rounding difference> is calculated by the following formula:
Round(<Value to convert>, <Result in source currency>, <Number of decimals>)
Difference, ResConversion are currencies
ResConversion = eToCurrency(50, eIEP, 2, Difference)
ResConversion is set to 34,94 and Difference is set to 0,01.
The following code line allows you to retrieve the initial amount:
InitAmount = eToEuro(ResConversion, eIEP, 2) - Difference
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