# RSHIFT()

*Since version 2.1*

Syntax:

rshift!(<byte expression> [, <byte positions>])

or

rshift(<int expression> [, <byte positions>])

The `RSHIFT()`

function shifts each bit in *expression* to the right by the number of *positions* and returns the result of the operation.

The second argument can be omitted and it defaults to 1.

Warning: passing *positions* bigger than 127 will lead to undefined results.

## Performance tip

Shifting the bits to the left is equivalent to dividing by powers of two, however much faster. Example:

rem -- this is slow x = 364 y = x / 4 rem -- this is fast x = 364 y = rshift(x, 2)