The bit shift left and right are often used in computer programming to shift the value of a single bit left or right by 1.
Why do you use the bit shift left and right?
This question is easy to answer. Sometimes people use it for internal calculations when they only need one instruction. Sometimes it's used for processing multimedia files such as images and audio, even though this is not explicitly necessary in the code. Some programmers might also use it just because they have forgotten what their algorithm does, or they are still trying to figure out how to fix their bug.
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