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11.9.2 Subfunctions

A function file may contain secondary functions called subfunctions. These secondary functions are only visible to the other functions in the same function file. For example, a file f.m containing

function f ()
  printf ("in f, calling g\n");
  g ()
function g ()
  printf ("in g, calling h\n");
  h ()
function h ()
  printf ("in h\n")

defines a main function f and two subfunctions. The subfunctions g and h may only be called from the main function f or from the other subfunctions, but not from outside the file f.m.