9.4.6  Numeric evaluation

The evalf command finds floating point approximations to the numbers in an expression or a matrix (see also Section 7.3.1).

• evalf takes one mandatory and one optional argument:
  • expr, an expression or a matrix.
  • Optionally, n, a positive integer representing the significant digits (by default DIGITS, which itself has a default value of 12; see Section 2.5.1).
• evalf(expr ⟨,n ⟩) returns expr with all the numbers replaced by floating point approximations to n digits.

Examples