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+---
+title: Making RadCalculatorPicker Recognize Period or Comma Key as Decimal
+description: Learn how to configure the RadCalculatorPicker in WPF to recognize the period or comma key as a decimal separator.
+type: how-to
+page_title: Configuring RadCalculatorPicker to Accept Period or Comma as Decimal Separator in WPF
+slug: kb-calculator-recognize-period-comma-decimal
+tags: radcalculator, wpf, keydown, decimal separator
+res_type: kb
+ticketid: 1642565
+---
+
+## Environment
+
+| Product | Version |
+| --- | --- |
+| RadCalculator for WPF | Current |
+
+## Description
+
+When using the RadCalculatorPicker on a device without a numeric keypad, the decimal key does not work as expected. This article demonstrates how to make RadCalculatorPicker recognize the period or comma key as a decimal separator. 
+
+## Solution
+
+To make RadCalculatorPicker recognize the period (.) or comma (,) key as the decimal separator, subscribe to the `KeyDown` event and execute the `RadCalculatorCommands.UpdateInput` command.
+
+#### __[C#]__
+{{region kb-calculator-recognize-period-comma-decimal-0}}
+	private void RadCalculatorPicker_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
+	{
+		if (e.Key == System.Windows.Input.Key.OemPeriod)
+		{
+			RadCalculatorCommands.UpdateInput.Execute(CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator);
+		}
+	}
+{{endregion}}