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decimal part of a float
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fab etore
Greenhorn
Joined: Jul 01, 2002
Posts: 9
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i would like to know how can i get the decimal part of a float. I think there must be a method for, by i can't find it.
please help me ;-)
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Ron Newman
Ranch Hand
Joined: Jun 06, 2002
Posts: 1056
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float f;
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float frac = f - (int)f;
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Ron Newman - SCJP 1.2 (100%, 7 August 2002)
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fab etore
Greenhorn
Joined: Jul 01, 2002
Posts: 9
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thanks
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Ilja Preuss
author
Sheriff
Joined: Jul 11, 2001
Posts: 14112
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Originally posted by Ron Newman:
float f;
....
float frac = f - (int)f;
That doesn't work well for f > Integer.MAX_VALUE.
Instead you should probably use
float frag = f - Math.ceil(f);
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Ron Newman
Ranch Hand
Joined: Jun 06, 2002
Posts: 1056
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But that works properly only for negative numbers...
[ October 14, 2002: Message edited by: Ron Newman ]
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Ilja Preuss
author
Sheriff
Joined: Jul 11, 2001
Posts: 14112
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Of course I meant *floor*, not ceil... :roll:
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Dirk Schreckmann
Sheriff
Joined: Dec 10, 2001
Posts: 7023
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Or float % 1.
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Ilja Preuss
author
Sheriff
Joined: Jul 11, 2001
Posts: 14112
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Originally posted by Dirk Schreckmann:
Or float % 1.
Wow, I didn't know that "%" was defined for floats in Java... 
That's certainly the most appropriate solution.
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subject: decimal part of a float
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