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- '\" $Header: /user6/ouster/tcl/man/RCS/while.n,v 1.1 93/06/16 16:48:27 ouster Exp $ SPRITE (Berkeley)
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- .so man.macros
- .HS while tcl
- .BS
- '\" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- while \- Execute script repeatedly as long as a condition is met
- .SH SYNOPSIS
- \fBwhile \fItest body
- .BE
-
- .SH DESCRIPTION
- .PP
- The \fIwhile\fR command evaluates \fItest\fR as an expression
- (in the same way that \fBexpr\fR evaluates its argument).
- The value of the expression must a proper boolean
- value; if it is a true value
- then \fIbody\fR is executed by passing it to the Tcl interpreter.
- Once \fIbody\fR has been executed then \fItest\fR is evaluated
- again, and the process repeats until eventually \fItest\fR
- evaluates to a false boolean value. \fBContinue\fR
- commands may be executed inside \fIbody\fR to terminate the current
- iteration of the loop, and \fBbreak\fR
- commands may be executed inside \fIbody\fR to cause immediate
- termination of the \fBwhile\fR command. The \fBwhile\fR command
- always returns an empty string.
-
- .SH KEYWORDS
- boolean value, loop, test, while
-