The GetBits command extracts the specified bits from a number. The locns argument can be a sequence of bit locations or bit location ranges, including negative ranges and negative offsets. Note that all bit locations are given with 0 as the location of the least significant bit. For example, -1..0 can be used to extract the bits in a number in reverse order.

The optional arguments for GetBits are as follows:

$\mathrm{with}\left(\mathrm{Bits}\right)\:$

$\mathrm{num}≔\mathrm{Join}\left(\left[1\,1\,0\,0\,0\,1\,0\,1\,0\,1\,1\,0\,1\,1\,1\right]\right)$

$\mathrm{num}≔30371$

$\mathrm{GetBits}\left(\mathrm{num}\,0\right)$

$1$

$\mathrm{GetBits}\left(\mathrm{num}\,-1\right)$

$1$

$\mathrm{GetBits}\left(\mathrm{num}\,-1\,\mathrm{bits}=16\right)$

$0$

$\left[\mathrm{GetBits}\left(\mathrm{num}\,0..-1\right)\right]$

$\left[1\,1\,0\,0\,0\,1\,0\,1\,0\,1\,1\,0\,1\,1\,1\right]$

$\mathrm{Split}\left(\mathrm{num}\right)$

$\left[1\,1\,0\,0\,0\,1\,0\,1\,0\,1\,1\,0\,1\,1\,1\right]$

$\left[\mathrm{GetBits}\left(\mathrm{num}\,-1..0\,\mathrm{bits}=16\right)\right]$

$\left[0\,1\,1\,1\,0\,1\,1\,0\,1\,0\,1\,0\,0\,0\,1\,1\right]$

$\mathrm{GetBits}\left(\mathrm{num}\,-1..0\,\mathrm{output}=\mathrm{number}\,\mathrm{bits}=16\right)$

$50542$

$\mathrm{Join}\left(\left[\mathrm{GetBits}\left(\mathrm{num}\,-1..0\,\mathrm{bits}=16\right)\right]\right)$

$50542$

$\mathrm{num2}≔\mathrm{GetBits}\left(\mathrm{num}\,8..15\,0..7\,\mathrm{output}=\mathrm{number}\right)$

$\mathrm{num2}≔41846$

$\mathrm{convert}\left(\mathrm{num}\,\mathrm{hex}\right)$

$\mathrm{76A3}$

$\mathrm{convert}\left(\mathrm{num2}\,\mathrm{hex}\right)$

$\mathrm{A376}$