6.6.8  Converting a number into an interval

The convert command (see Section 10.1.10) can convert an expression which evaluates to a number to the smallest interval which contains the number.

• convert takes two mandatory arguments and one optional argument:
  • expr, a number which evaluates to a number.
  • interval, a reserved word.
  • Optionally, n, an integer greater than 15 giving the desired number of digits.
• convert(expr,interval ⟨,n ⟩) returns the smallest interval containing the value of expr.

Examples