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Tip of the Day
Language: Client Scripting
Expertise: Beginner
Feb 11, 2000

Generate a Unique Whole Number

Question:
How can I generate a unique number using JavaScript?

Answer:

You can generate random numbers in JavaScript using the Math.random() method. This function returns a fractional random number between 0 and 1. Unlike other languages, JavaScript will initialize a random seed for you automatically so you don't have to worry about anything else. Of course, in most cases, a fraction isn't what you'll want. A whole number between a low and a high bound would probably be more useful. This simple function called GetRandomNumber does just this:




	

	

	

	
	




    
    





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