>> 3.14 + 8

ans =

   11.1400

>> 4 ^ 3

ans =

    64

>> help +
 +   Plus.
    X + Y adds matrices X and Y.  X and Y must have the same
    dimensions unless one is a scalar (a 1-by-1 matrix).
    A scalar can be added to anything.  
 
    C = <strong>plus</strong>(A,B) is called for the syntax 'A + B' when A or B is an
    object.

    <a href="matlab:doc plus">Reference page for plus</a>
    <a href="matlab:matlab.internal.language.introspective.overloads.displayOverloads('plus')">Other functions named plus</a>

>> help help
   <strong>help</strong> Display help text in Command Window.
      <strong>help</strong>, by itself, lists all primary help topics. Each primary topic
      corresponds to a folder name on the MATLAB search path.
 
      <strong>help</strong> NAME displays the help for the functionality specified by NAME,
      such as a function, operator symbol, method, class, or toolbox.
      NAME can include a partial path.
 
      Some classes require that you specify the package name. Events,
      properties, and some methods require that you specify the class
      name. Separate the components of the name with periods, using one
      of the following forms:
 
          <strong>help</strong> CLASSNAME.NAME
          <strong>help</strong> PACKAGENAME.CLASSNAME
          <strong>help</strong> PACKAGENAME.CLASSNAME.NAME
 
      If NAME is the name of both a folder and a function, <strong>help</strong> displays
      help for both the folder and the function. The help for a folder
      is usually a list of the program files in that folder.
 
      If NAME appears in multiple folders on the MATLAB path, <strong>help</strong> displays
      information about the first instance of NAME found on the path.
 
      NOTE:
 
      In the help, some function names are capitalized to make them 
      stand out. In practice, type function names in lowercase. For
      functions that are shown with mixed case (such as javaObject),
      type the mixed case as shown.
 
      EXAMPLES:
 
      help close           % help for the CLOSE function
      help database/close  % help for CLOSE in the Database Toolbox
      help database        % list of functions in the Database Toolbox 
                           % and help for the DATABASE function
      help containers.Map.isKey   % help for isKey method
 
      See also <a href="matlab:help doc">doc</a>, <a href="matlab:help docsearch">docsearch</a>, <a href="matlab:help lookfor">lookfor</a>, <a href="matlab:help matlabpath">matlabpath</a>, <a href="matlab:help which">which</a>.

    <a href="matlab:doc help">Reference page for help</a>

>> clc
>> 3.14 + 8

ans =

   11.1400

>> format compact
>> 3.14 + 8
ans =
   11.1400
>> format long
>> 3.14 + 8
ans =
  11.140000000000001
>> diary off