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What is left shift?
Left shift is a bitwise operation in which the bits of a binary number are shifted to the left by a certain number of places. This has the effect of multiplying the number by a factor of two for each place shifted. For example, shifting the binary number 101 by two places to the left results in 10100, which is equivalent to the decimal number 20. In addition to multiplication, left shift can be used to divide a number by two, with each shift to the left resulting in a half of the original number. It can also be used to move bits from one byte to another and to fill in empty bits in a byte. Left shift is a very efficient operation since it can be done with a single instruction, and is often used in programming and digital signal processing.
1. Logical Left Shift: This type of left shift shifts the bits of a binary number to the left, discarding the bit that is shifted off and inserting a 0 in the least significant bit (LSB) position.
2. Arithmetic Left Shift: This type of left shift is similar to the logical left shift, except that the bit shifted off is replaced with the same value as the LSB. This is useful for preserving the sign of a number when performing arithmetic operations.
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