Shifting Bits
You can take the 8 bits of a byte and shift them all to the left or to the right. You can do this using the bitwise left shift operator (<<
) or the bitwise right shift operator (>>
). Notice in Figure 7.8 how each shift is in its own box. You are essentially moving a bit to the next box over.
You could write this in code like so:
var a:UInt8 = 0b01010101 //85a << 1 //170
Notice that this bitwise left shift had the effect of doubling the integer. Doing a bitwise right shift, on the other hand, halves the number:
var a:UInt8 = 0b01010101 //85a >> 1 //42
Notice that because you are working with ...
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