Specify index_var to make that variable count from one value to
another by a particular increment. @var{index_var} must be a pre-existing
numeric variable. @var{start}, @var{end}, and @var{incr} are numeric expressions
Specify index_var to make that variable count from one value to
another by a particular increment. @var{index_var} must be a pre-existing
numeric variable. @var{start}, @var{end}, and @var{incr} are numeric expressions