Javascript
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JavaScript is a scripting language used for HTML web pages. It is loosely based on Java and built into major browsers. JavaScript code is placed within <script> tags in the HTML and can be included anywhere but is typically in the <body>. A basic "Hello World" example writes that text to the document. JavaScript is case sensitive, uses semicolons but they are optional when statements are on separate lines. Variables are declared with var, if/else statements control execution. Examples determine if a year is a leap year or check a password.
Javascript
- 1. JAVASCRIPT • JavaScript is a scripting language produced by Netscape for use within HTML Web pages. • JavaScript is loosely based on Java and it is built into all the major modern browsers. • JavaScript is a lightweight, interpreted programming language
- 2. JAVASCRIPT SYNTAX • A JavaScript consists of JavaScript statements that are placed within the <script>... </script> HTML tags in a web page. • You can place the <script> tag containing your JavaScript anywhere within your web page but it is preferred way to keep it within the <body> tags.
- 4. KEY POINTS • Whitespace and Line Breaks • Semicolons are Optional • But when formatted in a single line as follows, the semicolons are required: var1 = 10; var2 = 20; • Case Sensitive: Time, TIme and TIME will have different meanings in JavaScript.
- 5. JavaScript Variables • Variables are declared with the var keyword as follows: <script> var money; var name; </script>
- 6. If…else Statement The if...else statement is the next form of control statement that allows JavaScript to execute statements in more controlled way. Syntax: if (expression) { Statement(s) to be executed if expression is true } else{ Statement(s) to be executed if expression is false }
- 7. Tutorial • Determine whether the entered year is leap or not. • Password checking.
- 8. Recruitment questions • On facebook page: Microsoft Mobile Innovation Lab Send your solutions at: [email protected]