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- while test body
- The while command evaluates test as an expression (in
- the same way that expr evaluates its argument). The
- value of the expression must be numeric; if it is non-
- zero then body is executed by passing it to the Tcl
- interpreter. Once body has been executed then test is
- evaluated again, and the process repeats until
- eventually test evaluates to a zero numeric value.
- Continue commands may be executed inside body to
- terminate the current iteration of the loop, and break
- commands may be executed inside body to cause immediate
- termination of the while command. The while command
- always returns an empty string.
-