Check whether a String ends with a number
The String represents text as a sequence of UTF-16 code units. The
String is a sequential collection of characters that is used to represent
text. The String is a sequential collection of System.Char objects.
The following .net c# tutorial code demonstrates how we can check whether a String ends with a number. In this .net c# tutorial we will determine whether a String’s last character is a number or not.
The String ToCharArray() method copies the characters in this instance to a Unicode character array. So, we can convert a String to a char array. The ElementAt() method allows us to get the item from a specified index position. This way, we get the last character of a String instance.
The Char IsDigit() method indicates whether a Unicode character is categorized as a decimal digit. We have to pass a Char object to this IsDigit(Char) method to check this provided Char is a digit or not. This method returns true if the provided Character is a decimal digit otherwise false.
The Char IsNumber() method indicates whether a Unicode character is categorized as a number. We have to pass a Unicode character to this method. This IsNumber(Char) method returns true if the provided character is a number otherwise false.
The following .net c# tutorial code demonstrates how we can check whether a String ends with a number. In this .net c# tutorial we will determine whether a String’s last character is a number or not.
The String ToCharArray() method copies the characters in this instance to a Unicode character array. So, we can convert a String to a char array. The ElementAt() method allows us to get the item from a specified index position. This way, we get the last character of a String instance.
The Char IsDigit() method indicates whether a Unicode character is categorized as a decimal digit. We have to pass a Char object to this IsDigit(Char) method to check this provided Char is a digit or not. This method returns true if the provided Character is a decimal digit otherwise false.
The Char IsNumber() method indicates whether a Unicode character is categorized as a number. We have to pass a Unicode character to this method. This IsNumber(Char) method returns true if the provided character is a number otherwise false.
string-endswith-number.aspx
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
//this section create string variables.
string stringPlants = "Extinguisher Moss. Eytelia";
string stringPlants2 = "Coast Polypody 5";
Label1.Text = "string of plants..................<br />";
Label1.Text += stringPlants;
Label1.Text += "<br />"+stringPlants2;
//this line get string end/last character
char stringLastCharacter = stringPlants.ToCharArray().ElementAt(stringPlants.Length - 1);
//this line get string end/last character
char stringLastCharacter2 = stringPlants2.ToCharArray().ElementAt(stringPlants2.Length - 1);
Boolean result = char.IsNumber(stringLastCharacter);
Boolean result2 = char.IsNumber(stringLastCharacter2);
//another option to test character number or letter
//Boolean result = char.IsDigit(stringLastCharacter);
//Boolean result2 = char.IsDigit(stringLastCharacter2);
Label1.Text += "<br /><br />stringPlants last character: " + stringLastCharacter;
Label1.Text += "<br />stringPlants2 last character: " + stringLastCharacter2;
Label1.Text += "<br /><br />stringPlants ends with number? " + result.ToString();
Label1.Text += "<br />stringPlants2 ends with number? " + result2.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>c# example - string endswith number</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:MidnightBlue; font-style:italic;">
c# example - string endswith number
</h2>
<hr width="550" align="left" color="Gainsboro" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="string endswith number"
OnClick="Button1_Click"
Height="40"
Font-Bold="true"
/>
</div>
</form>
</body>
</html>
