Math Example – Data Type – JavaScript Syntax – JS Math Example
Math Example – Data Type – JavaScript Syntax – JS Math Example
Purpose: – Illustrates the JavaScript syntax for the Math Object .
Prerequistes:
- Install Visual Web Developer 2008
Syntax: var y = Math.sqrt(25); – Demonstrates how to use properties and methods of Math object.
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:
- Use Visual Web Developer 2008
- 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.
- Add New folder named “DataType”
- Right-click project name in solution explorer;
- add new folder;
- name of folder should be: DataType
- Add HTML Page Named Math to DataType folder
- Right-click DataType folder;
- add new item;
- Select HTML Page
- HTML Page name should be Math
- Click on copy code in code below to copy code into HTML Page Math.htm
- Right-click on HTML page Math and select view in browser
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Boolean</title>
<script type="text/javascript" >
//*****************************************************
// Math Object
//*****************************************************
// NOTE: Math Object is not a constructor and you
// do not have to instantiate by creating new object
// before you can use it
//*****************************************************
// GENERAL SYNTAX:
// Properties:
// var x = Math.PI; // Returns PI
// Method:
// var x = Math.sqrt(25); // Returns the square root of 25
// Math Object Properties:
// Property Description
// E Returns Euler's number (approx. 2.718)
// LN2 Returns the natural logarithm of 2 (approx. 0.693)
// LN10 Returns the natural logarithm of 10 (approx. 2.302)
// LOG2E Returns the base-2 logarithm of E (approx. 1.442)
// LOG10E Returns the base-10 logarithm of E (approx. 0.434)
// PI Returns PI (approx. 3.14159)
// SQRT1_2 Returns the square root of 1/2 (approx. 0.707)
// SQRT2 Returns the square root of 2 (approx. 1.414)
// Math Object Methods
// Method Description
// abs(x) Returns the absolute value of x
// acos(x) Returns the arccosine of x, in radians
// asin(x) Returns the arcsine of x, in radians
// atan(x) Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians
// atan2(y,x) Returns the arctangent of the quotient of its arguments
// ceil(x) Returns x, rounded upwards to the nearest integer
// cos(x) Returns the cosine of x (x is in radians)
// exp(x) Returns the value of Ex
// floor(x) Returns x, rounded downwards to the nearest integer
// log(x) Returns the natural logarithm (base E) of x
// max(x,y,z,...,n) Returns the number with the highest value
// min(x,y,z,...,n) Returns the number with the lowest value
// pow(x,y) Returns the value of x to the power of y
// random() Returns a random number between 0 and 1
// round(x) Rounds x to the nearest integer
// sin(x) Returns the sine of x (x is in radians)
// sqrt(x) Returns the square root of x
// tan(x) Returns the tangent of an angle
//1. Example using property
var x = Math.PI; // Returns PI
document.write("PI = " + x);
document.write("<br />");
//2. Example using method
var y = Math.sqrt(25); // Returns the square root of 25
document.write("Square root of 25 = " + y);
document.write("<br />");
</script>
</head>
<body>
</body>
</html> |
