What Does the JavaScript `>>>` Operator Do?

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Understanding the JavaScript '>>>' Operator

In JavaScript, the >>> operator is a bitwise shift operator that performs an unsigned right shift. Unlike the >> operator, which sign-extends the shifted number, >>> converts the number to a 32-bit unsigned integer before performing the shift.

Usage:

The syntax of the >>> operator is:

number >>> shiftCount

Where:

• number is the value to be shifted.
• shiftCount is the number of bits to shift to the right.

Behavior:

The >>> operator shifts the bits of the number to the right by the specified shiftCount. If the shiftCount is greater than the number of bits in the number, the result is 0.

Example:

Consider the following code:

1 >>> 0 === 1
-1 >>> 0 === 0xFFFFFFFF
1.7 >>> 0 === 1
0x100000002 >>> 0 === 2
1e21 >>> 0 === 0xDEA00000

Note that -1 is converted to a 32-bit unsigned integer (0xFFFFFFFF), while 1e21 is converted to the largest 32-bit unsigned integer (0xDEA00000).

Application:

The >>> operator can be used to convert non-integer numbers to integers, truncate negative numbers to zero, and extract the highest-order bits of a number. It is also commonly used in bit manipulation tasks, such as masking or checking for specific bit patterns.

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