Javascript

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

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.

HELLO WORLD!!
<html>
<body>
<script>
document.write("Hello World!")
</script>
</body>
</html>

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.

JavaScript Variables
• Variables are declared with the var keyword as
follows:
<script>
var money; var name;
</script>

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 }

Tutorial
• Determine whether the entered year is leap or
not.
• Password checking.

Recruitment questions
• On facebook page:
Microsoft Mobile Innovation Lab
Send your solutions at:
ekanshpurwar@gmail.com

Javascript

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Javascript