Left shift and right shift calculation ..

Question

i need to calculate left and right shift in java. in java i am able to code this. but i like to know how it calculate . Can any body here enplane me with Example. I am using below logic, plz check it's correct or not.

4>>2 ans is 1

Logic 4>>2 0100>>2 0001 = 1

@cameron Buie I need logic how to calculate sift(left and right) — Jani, May 14 '13 at 11:43
@Jani A left shift corresponds by a division by 2. A right shift corresponds to multiplication my 2. This is often handy to keep in mind when doing bit shifting. — Daryl, May 14 '13 at 11:46

Cameron Buie · Answer 1 · 2013-05-14T18:23:54.073

4

If I correctly understand what you're doing, $$n>>m=\frac{n}{2^m}$$ and $$n<<m=n\cdot 2^m.$$ This is similar to the way that moving a decimal point one place to the left (right) corresponds to division (multiplication) by $10$.

For example, then: $$16>>1=8\\16>>2=4\\16>>3=2,$$ and so on; or the other way, $$5<<1=10\\5<<2=20\\5<<3=40,$$ and so on.

edited May 14 '13 at 18:23

answered May 14 '13 at 11:46

Cameron Buie

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Thanks a lot..It helped me to understand clearly. – MRUNAL MUNOT Jan 07 '22 at 08:59

Left shift and right shift calculation ..

1 Answers1