what does this << mean?
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Thread: what does this << mean?

  1. #1
    Join Date
    Feb 2001
    Posts
    2,455

    what does this << mean?

    Looking at an example of drawing rounded rectangles, I see this:
    Code:
    int d = raius << 1;
    What does this do? I know it is a shift operator, but what is this doing?

    Mike B

  2. #2
    Join Date
    Mar 2002
    Location
    NY, USA
    Posts
    12,097

    Re: what does this << mean?

    Pefroming a shift to the left by one bit. It is basic binary methamatics and is equivilant to a *2 when applied to an integral type (but often faster - althought the compiler may internally optimize a *2 into a <<1)
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