Math Example – Data Type – JavaScript Syntax – JS Math Example
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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
| HTML | | copy code | | ? |
< !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> |
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