# Talk:Skull

*x*[+*y*] and *x*[-*y*] need to be added to the Command section. E.g., the addition example has

{0[4]} // set cell 0 to 4 ... {0[-1]} // subtract cell 0 by 1 {1[+1]} // add 1 to cell 1

so evidently the presence of a sign is supposed to change the the assignment operation *x*[*y*] ("Set the specified cell (x) to the specified number (y)") into an addition or subtraction operation, which is a different kind of critter. --r.e.s. (Talk) 19:58, 7 January 2008 (UTC)

## "While programs"

This language seems to be a variant of some that are commonly used in introductory courses on computability. (Designed to be Turing-complete, of course.) For example, in these lecture notes see p.49: http://www.math.psu.edu/clemens/Courses/Math459_Fall03/computability.pdf --r.e.s. (Talk) 20:58, 7 January 2008 (UTC)

## Change of command {"x"["y"]}

I have changed the command {"x"["y"]} so that it now only increments or decrements.