qck.hlp (Table of Contents; Topic list)
STEP Keyword
  Summary             Example                Contents  Index  Back
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 STEP Keyword
 
 ■ The STEP keyword specifies how much to increase the counter in each
   iteration of a FOR...NEXT loop. STEP is also be used in graphics
   statements to specify that pixel coordinates are relative to the current
   graphics cursor position.
 
 See: CIRCLE Statement          FOR...NEXT Statement
      GET Statement (Graphics)  LINE Statement
      PAINT Statement           PUT Statement (Graphics)
      PRESET Statement          PSET Statement