Omitting the Test

When the test part of a for is omitted it is as if the value true were put in its place. So,

for ( initialize ;   ; change )
  loopBody ;

is the same as:

for ( initialize ;  true  ; change )
  loopBody ;

This is done for compatibility with the language "C" and should not be done in newly written programs. In truth, it should never have been done in "C".