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#1
 
 
Want an array of Random numbers I am learning java programming, and want to develop a small program code to help me with my other codes. I am looking to develop a program that will give me random numbers which i can assign to array which is of userdefined size. Would appreciate any help from the techies in here. 
#2
 
 
Re: Want an array of Random numbers If you want to take the input array size from the user, you need to use the JOptionPane(). After you get the array size, make a new array of that size. Then what you need to do is use a loop to fill the array with random numbers, which can be generated by the Math.random(). Remember: Math.random() gives value between 0 and 1. For your purpose, you can multiply the above number by some number and floor it by the Math.floor() method. Like if you want the range from 0 to 10, multiply the random number by 10. In case you still face any problems, please feel free to post it Last edited by Modifier : 03112009 at 02:19 PM. 
#3
 
 
Re: Want an array of Random numbers I do know how to use the JOPane() and will try that Math.random() and Math.floor(). I have one more question, how do i increase the lower level of the limit.? that is if the lower limit is 0 and i want it to be 5? Thanks a lot! Last edited by InterNetWorKed : 03112009 at 02:22 PM. 
#4
 
 
Re: Want an array of Random numbers I am pretty new to Java. I was going through the post and I tried he Math.random() and Math.floor(), but i want to know what exactly does the Math.floor() method do..?? i mean i used it alright, but what does it do..??? Last edited by Windowed : 03112009 at 02:20 PM. 
#5
 
 
Re: Want an array of Random numbers InterNetWorKed Just add the number to the floored number like Code: Math.floor(Math.random()*10)+5 Flooring means rounding up.. like when u get a random number, it will be between 0 and1, and when you multiply it with some number it can result in a decimal number, but what is required is an integer.So the Math.floor() is used. remember: Math.floor() rounds just removes the decimals.. that is if number is 2.1 it will be rounded to 2, also 2.9 will be rounded to 2 as it is being Floored. In case of anything else please feel free to ask. 

Tags: array, java programming, program code, random 
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