NetLogo Help: back bk

### back1.0 bk1.0

#### back number

The turtle moves backward by number steps. (If number is negative, the turtle moves forward.)

Turtles using this primitive can move a maximum of one unit per time increment. So `bk 0.5` and `bk 1` both take one unit of time, but `bk 3` takes three.

If the turtle cannot move backward number steps because it is not permitted by the current topology the turtle will complete as many steps of 1 as it can and stop.

See also forward, jump, can-move?.

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