A single expression that will return true if the lower four bits of x are the same as the lower four bits of y is; (x & 0x0F) == (y & 0x0F)
There are different methods of writing programs such as python and others. However, in this case, it is pertinent to know that this compiler that will return true if the lower four bits of x are the same as the lower four bits of y doesn't accept binary constants and as such we will use hexidecimal instead. For example; for 0b00111111, we will use 0x3F.]
Thus, using that same concept above, the single expression that will return true if the lower four bits of x are the same as the lower four bits of y is; (x & 0x0F) == (y & 0x0F)
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