for(n)                Tcl Built-In Commands                for(n)



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NAME
     for - ``For'' loop

SYNOPSIS
     for _s_t_a_r_t _t_e_s_t _n_e_x_t _b_o_d_y
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DESCRIPTION
     For is a looping command, similar in structure to the C  for
     statement.   The _s_t_a_r_t, _n_e_x_t, and _b_o_d_y arguments must be Tcl
     command strings, and _t_e_s_t is an expression string.  The  for
     command  first invokes the Tcl interpreter to execute _s_t_a_r_t.
     Then it repeatedly evaluates _t_e_s_t as an expression;  if  the
     result  is  non-zero it invokes the Tcl interpreter on _b_o_d_y,
     then invokes the Tcl interpreter on _n_e_x_t, then  repeats  the
     loop.   The command terminates when _t_e_s_t evaluates to 0.  If
     a continue command is invoked within _b_o_d_y then any remaining
     commands  in the current execution of _b_o_d_y are skipped; pro-
     cessing continues by invoking the Tcl interpreter  on  _n_e_x_t,
     then  evaluating  _t_e_s_t,  and  so  on.  If a break command is
     invoked within _b_o_d_y or  _n_e_x_t,  then  the  for  command  will
     return immediately.  The operation of break and continue are
     similar to the corresponding statements in C.   For  returns
     an empty string.


KEYWORDS
     for, iteration, looping
























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