Transfers control and passes arguments to a function.  Format:

     nam (p[,p]...)

     nam  Is the name of the function or the name of an entry
          point to the function.

     p    Is a value to be passed to the function.  The value
          can be a constant, the name of a variable, the name
          of an array element, the name of an array, an expression,
          a substring, field reference, or the name of a subprogram
          or entry point to a subprogram (must be defined as
          external).  You cannot specify more than 255 arguments.