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Segment Binding
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The SegmentBinding type is used to indicate a range for a named symbol.

First give the symbol, then an = and finally a segment of values. ::

  x = a..b
    x= a..b
                            Type: SegmentBinding Symbol

This is used to provide a convenient syntax for arguments to certain
operations. ::

  sum(i**2, i = 0..n)
      3     2
    2n  + 3n  + n
    -------------
          6
                            Type: Fraction Polynomial Integer

  draw(x**2, x = -2..2)
    TwoDimensionalViewport: "x*x"
                            Type: TwoDimensionalViewport


The left-hand side must be of type Symbol but the right-hand side can
be a segment over any type. ::

  sb := y = 1/2..3/2
        1    3
    y= (-)..(-)
        2    2
                            Type: SegmentBinding Fraction Integer

The left- and right-hand sides can be obtained using the variable and
segment operations. ::

  variable(sb)
    y
                            Type: Symbol

  segment(sb)
     1    3
    (-)..(-)
     2    2
                            Type: Segment Fraction Integer

See Also:

* )help Segment
* )help UniversalSegment
* )show SegmentBinding