interval -- construct an interval

• Usage:

  I = interval(n)

  I = interval(l,r)

  I = interval([l,r])

  I = interval(n,Precition => prec)

  I = interval(l,r,Precition => prec)

  I = interval([l,r],Precition => prec)

• Inputs:
  • n, a number,
  • l, a number,
  • r, a number,
• Optional inputs:
  • Precision => an integer, default value -1, specifies the desired precision of the output, a value of -1 uses the defaultPrecision or the minimum precisions of the inputs.
• Outputs:
  • I, a real interval,