Contents Previous Next Subchapters Current Chapters-> definingfun return clearfun arguments nargin argnumber varwithfun recursion forward funarguments multiplereturn nargout funvar localvar localfun localvarfun feval profile Parent Chapters-> Omatrix6 userdefined argnumber Search Tools-> contents reference index search

Defining Functions With Variable Numbers Of Arguments
 Syntax `arg(`value`)` See Also arguments , nargin , nargout

Description
References the specified function argument, where value is an non-negative integer scalar.

Number Of Arguments
If a function call does not have multiple return values , the expression `arg(0)` is equal to the number of arguments in a function reference. If you enter ```      clear      function f(a, b, c, d, e) begin           print arg(0)      end      f(2, 4, 6) ``` O-Matrix will respond ```      3 ```
Referencing Arguments By Index
The expression `arg(1)` is equal to the first argument of the function, `arg(2)` is equal to the second argument, and so on. ``` ```If you enter ```      clear      function maximum() begin           imax = 1           for i = 2 to arg(0) begin                if arg(i) > arg(imax) then imax = i           end           return arg(imax)      end      maximum(1., 5, 2., 6) ``` O-Matrix will respond ```      6 ```
Reference
If an argument is a simple variable name, you can assign a new value to the argument using this notation (see arguments, Reference for a discussion of a simple variable). For example, if you enter ```      clear      function f() begin           arg(2) = 3      end      x = 5      y = 6      f(x, y)      print x, y ``` O-Matrix will respond ```      5 3 ```