Info Catalog eintr: Install eintr: Writing Defuns eintr: Interactive Options

eintr: Interactive

 
 3.3 Make a Function Interactive
 ===============================
 
 You make a function interactive by placing a list that begins with the
 special form ‘interactive’ immediately after the documentation.  A user
 can invoke an interactive function by typing ‘M-x’ and then the name of
 the function; or by typing the keys to which it is bound, for example,
 by typing ‘C-n’ for ‘next-line’ or ‘C-x h’ for ‘mark-whole-buffer’.
 
    Interestingly, when you call an interactive function interactively,
 the value returned is not automatically displayed in the echo area.
 This is because you often call an interactive function for its side
 effects, such as moving forward by a word or line, and not for the value
 returned.  If the returned value were displayed in the echo area each
 time you typed a key, it would be very distracting.
 

Menu

 
· Interactive multiply-by-seven  An overview.
· multiply-by-seven in detail    The interactive version.
 

Info Catalog eintr: Install eintr: Writing Defuns eintr: Interactive Options