String.CharAt Example: JavaScript Syntax – JS String.CharAt Example

String.CharAt Example: JavaScript Syntax – JS String.CharAt Example

Purpose: – Illustrates the for the .

View Other String Properties and Methods

Prerequistes:

Syntax: string.charAt(index) – Returns the character at the specified index – index is required. 0 is the first character and the last character in a string is string.length-1.

Restrictions: None

Notes:

  • You can build your own library of syntax examples by using same web site over and over and just add new files to it.

Instructions:

  1. Use Visual Web Developer 2008
  2. Create new web site;
    • Click File/New Web Site
    • Select ASP.NET Website Template
    • Select C-Sharp for Language
    • name of Web Site could be JavaScript_Syntax.
  3. Add New folder named “DataType”
    • Right-click project name in solution explorer;
    • add new folder;
    • name of folder should be: DataType
  4. Add New subfolder to “DataType” folder named “String”
    • Right-click folder named “DataType” in solution explorer;
    • add new folder;
    • name of folder should be: String
  5. Add New subfolder to “String” folder named “Methods”
    • Right-click subfolder named “String” in solution explorer;
    • add new folder;
    • name of folder should be: Methods
  6. Add HTML Page Named StringCharAt to Methods folder
    • Right-click Methods subfolder;
    • add new item;
    • Select HTML Page
    • HTML Page name should be StringCharAt
  7. Click on copy code in code below to copy code into HTML Page StringCharAt.htm
  8. Right-click on HTML page StringCharAt and select view in browser
  9. < !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
     
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>IdealProgrammer.com: String.CharAt Method</title>
        <!-- 
        ***************************************************
        * This example is from http://idealprogrammer.com *
        ***************************************************
        -->
        <script type="text/javascript" >
            //    charAt(index) 	Returns the character at the specified index - index is required
            //    0 is the first character and the last character in a string is string.length-1
            var strCharAt = "This is a string.";
            document.write("strCharAt(0): " + strCharAt.charAt(0) + "<br />");
            document.write("strCharAt.charAt(strCharAt.length - 1): " + strCharAt.charAt(strCharAt.length - 1));
     
     
     
    </script>
    </head>
    <body>
     
    </body>
    </html>