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Urgent: Need help doing math in java Rate Topic: -----

#1 User is offline   sevenalive 

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  Posted 20 September 2005 - 04:42 PM

how do i take a long number

ex. 40.344644

and make it to

40.3

basically round it.

any ideas

This post has been edited by Seven Alive: 20 September 2005 - 05:02 PM


#2 User is offline   aussiecanuck46 

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Posted 20 September 2005 - 09:16 PM

I'd suggest using the round() method. It rounds a double value to an integer. But if you first multiply that double value by 10 and then round it you could then divide the rounded value by 10 into a double value.

#3 User is offline   matthewk 

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Posted 30 September 2005 - 03:01 PM

You could take your value float/double num:
num = (int)num + (int)((num - (int)num)*10)

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