Strings
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This document discusses JavaScript strings and some of the methods that can be used to manipulate them. Strings can be used to store and manipulate text. Some string methods include substring to return a character at a specific position, toUpperCase and toLowerCase to convert case, indexOf to find the position of a character, and length to determine the number of characters. Examples are provided using prompt and write to demonstrate these string methods.
Strings
- 1. Strings Remember there are 3 types of variables we can work with numbers, statements (if conditions) and strings. JavaScript strings are used for storing and manipulating text.
- 2. What can we do with strings? Copy the following and test it in dreamweaver Substring shows the position of characters in a word entered. <script type="text/javascript"> var name=prompt("enter your name","") document.write(name.substring(0,1)) </script>
- 3. toUpperCase will make the word you enter be produced by the program in upper case. <script type="text/javascript"> var name=prompt("enter your name","") document.write(name.toUpperCase()) </script>
- 4. tolowerCase will make the word you enter be produced by the program in lower case. Try entering your name in upper case to see it work. <script type="text/javascript"> var name=prompt("enter your name","") document.write(name.toLowerCase()) </script>
- 5. indexOf will give the position of a particular character/letter you enter. <script type="text/javascript"> var name=prompt("enter your name","") document.write(name.indexOf(“a”)) </script>
- 6. Length will give the length of the word you enter such if you entered hello, it would be 5 as it's 5 letters long. <script type="text/javascript"> var name=prompt("enter your name","") document.write(name.length) </script>