Used with other statements, such as FOR, to determine the increase or decrease applied to every next value of a sequence
Implemented by: ansimin, ansifull, Altair, Applesoft, TI994, CBM, Atari, trs80, level2, trscolor, zx81, spectrum, Atom, BBC, MSX, bw32, QBasic, VBDOS, FreeBASIC, Gambas, minibasicmm, EndBASIC
With variations:
Also written as: