statement/DEF                                                   statement/DEF
 
 NAME
     DEF FN -- Defines a function
 
 ABBREVIATION
     d <shift> E

 SYNOPSIS
     DEF FN <fnc_name>(<variable>)=<expression>

 FUNCTION
     This command allows you to define a complex calculation as a function. 
     In the case of a long formula that is used several times within a 
     program, this can save a lot of space.
     The name you give the numeric function begins with the letters FN, 
     followed by any legal numeric variable name (<fnc_name>). First you must
     define the function by using the statement DEF followed by the name 
     (<fnc_name>) you've given the function. Following the name is a set of 
     parentheses () with a numeric variable (<variable>) enclosed. Then you 
     have an equal sign, followed by the formula (<expression>) you want to 
     define. You can call the formula, substituting any number for a variable
     (<variable>).
 
 INPUTS
     <fnc_name>   - name of the function
     <variable>   - variable name used in the formula
     <expression> - formula
 
 RESULT
     Defines a function to be used within a program.

 EXAMPLES
     10 DEF FNA(X)=12*(34.75-X/.3)+X
     20 PRINT FNA(7)
         The number 7 is inserted each place X is located in the formula 
         given in the DEF statement.
 
 NOTES
     DEF FN can only be used with standard numeric functions, not integer or 
     string functions.
 
 BUGS
     None
 
 SEE ALSO
     None