for

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



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NAME
       for - ``For'' loop

SYNOPSIS
       for start test next body
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DESCRIPTION
       For is a looping command, similar in structure to the C for statement.
       The start, next, and body arguments must be Tcl command strings, and
       test is an expression string.  The for command first invokes the Tcl
       interpreter to execute start.  Then it repeatedly evaluates test as an
       expression; if the result is non-zero it invokes the Tcl interpreter on
       body, then invokes the Tcl interpreter on next, then repeats the loop.
       The command terminates when test evaluates to 0.  If a continue command
       is invoked within body then any remaining commands in the current
       execution of body are skipped; processing continues by invoking the Tcl
       interpreter on next, then evaluating test, and so on.  If a break
       command is invoked within body or next, 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



Tcl                                                                     for(n)