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Numbers

Numerical values are all of type double and complex. . The default type is double.
Exponential notation can be used to represent numbers; e.g. x = 1.0e10; assigns the value 1.0x10¹⁰ to x.

Predefined values

pi     ratio of circumference of a circle to its diameter 
i      unit imaginary value
Inf    representation of `infinity'.
NaN    representation of `Not a Number'.

To change the format of the values when they are displayed use the format command. One can also change this format from the Preferences dialog that appears when the File/Preferences item is selected in the GUI.

Use eps to display the floating point relative accuracy.

See Also : Displaying/Saving Results

Samples

% Printing out 15 digits of the the internal value of pi

  format long 
  pi
  ans =
   3.14159265358979

% Resetting the format to 5 digits and then evaluating the sqrt(-1)

  format short
  sqrt(-1)
  ans =
        0+ 1.0000i

% Evaluating the complex exponential of i :

 exp(1.0i)
 ans =
   0.5403+ 0.8415i

% Generate Inf and NaN's

  1.0/0.0
  Warning: Divide by zero.
  ans =
   Inf

  0.0/0.0
  Warning: Divide by zero.
  ans =
   NaN