Pure JavaScript

Infinity

JavaScript 1.3+, JScript 1.0+ Nav4.06+, IE 3+, Opera3+ Syntax

Infinity

Description

Infinity is a JavaScript keyword that represents positive infinity.

Example

Listing 6.146 shows how the Infinity keyword is used. An input text box is provided to enter a value to be compared to Infinity. If any number is entered, it will result in being less than Infinity. However, if the word "Infinity" is entered, it will result in being equal to Infinity.

Listing 6.146 Example of infinity Keyword

<html> <body> <script language = "JavaScript"> <!–– Hide // function checks to see if the input is greater, less than, or equal // to the value input by the user. function checkNum(){ input=document.form1.num.value; if(input < Infinity){ alert("Your ...