# $EPIC: jot,v 1.3 2001/07/24 18:46:34 jnelson Exp $
Synopsis:
   $jot(<start> <stop> <interval>)

Technical:
   * If the <start> argument is omitted the empty string is returned.
   * If the <stop> argument is omitted the empty string is returned.
   * If the <interval> argument is omitted the default value of 1 is used.
   * If the <interval> argument is 0, the empty string is returned.
   * The <interval> argument should be an integer value -- support for
     fractional numbers will be added in the future.
   * The <interval> argument should be positive; but if you specify a
     negative value, the absolute value of <interval> will be used.
   * If <start> is less than <stop>, then consider the sequence 
		[<start>, <start>+<interval>, 
		    <start>+<interval>+<interval>, ...  <L>], 
		where <L> is less than or equal to <stop>.
   * If <start> is greater than <stop>, then consider the sequence
		[<start>, <start>-<interval>, 
		    <start>-<interval>-<interval>, ...  <L>], 
		where <L> is greater than or equal to <stop>.
   * This function returns a list of words that correspond to the elements
     in the smallest sequence that models the appropriate sequence.

Practical:
   This function creates a list of all of the numbers between <start> and 
   <stop>, with a step of <interval>.  Ranges can be ascending or descending,
   depending on whether <stop> is greater than or less than <start>.  You can
   iterate over the return value with FE or FOR i IN.  Another popular
   use is to pass the return value to $chr() to create a range of ascii 
   characters.

Returns:
   Every <interval>th number between <start> and <stop>, inclusive.

Examples:
   $jot(2 6)             returns "2 3 4 5 6"
   $jot(2 7 2)		 returns "2 4 6"
   $jot(3 -2)            returns "3 2 1 0 -1 -2"
   $jot(4)               returns ""  (empty string)
   $jot(4 6 8)           returns "4"
   $jot(a 4)             returns "0"

See Also:
   chr(6); isdigit(6)