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Is 'unsigned' a datatype by itself?

Hi,
I have seen that some of the example programs availbale in this site define/declare variables as unsigned.

For eg: unsigned voltage; //A-to-D example program

What type would voltage in the above case assume? If it just holds a numeric value between 0 and 255 can I directly say
float f = voltage/4.5;
or do I need to do any casting on this statement.
Thanks in advance

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  • "The CD is the same for 'full' and 'eval' the dongle is what opens up what you have to pay for."

    In fact, you need both a dongle and a Serial Number - and these are supplied, with instructions, when you pay for the product:

    The Serial Number is needed once to install the the prouct;

    The Dongle is requires every time you use the installed product.

    You also need a valid Serial Number for support; your serial number (and its expiry date) is shown in the uVision Help/About.

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