Did you not receive a copy of the manual when your purchased PBP? Go to the documentation section of this forum and there you will find a link for the manual. A good start is to check the website of the authors... www.melabs.com there's lots of interesting things, resources and sample pieces of code - as well as the latest manual too... it's important to study it as you will then discover why you can't do floating-point numbers directly.
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