for(3Tcl)

NAME
     for - ``For'' loop

SYNOPSIS
     for start test next body


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