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Index › Programming Questions & Help › Syntax Questions › what is the f in 0.1f
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what is the f in 0.1f? (Read 1419 times)
Robert
what is the f in 0.1f?
May 27th, 2010, 2:38pm  
Sim sim = new Sim(0,0.1f);

I've run into this notation several times and I don't understand the f.
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PhiLho 
Re: what is the f in 0.1f?
Reply #1 - May 27th, 2010, 2:45pm  
Java has two kinds of floating point numbers: floats and doubles.
floats have a smaller range, both in precision (number of significant digits) and in values. But they are smaller (important when you have lot of them!) and might be computed faster.
doubles have a better precision and a bigger range, but are twice as big.

In Java, 3.1415 is a double. If you want to make it a float, you write: 3.1415f or 3.1415F.
In Processing, you don't need to do that (to simplify syntax): floats are enough for most cases, so it defaults all numbers with a decimal point to floats.
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Rapatsk1
Re: what is the f in 0.1f?
Reply #2 - May 28th, 2010, 9:35am  
Cool. Was wondering about that myself. Nice explanation PhiLho!
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