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-'\"
-'\" Copyright (c) 1993 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\" 
-.TH if n "" Tcl "Tcl Built-In Commands"
-.so man.macros
-.BS
-'\" Note:  do not modify the .SH NAME line immediately below!
-.SH NAME
-if \- Execute scripts conditionally
-.SH SYNOPSIS
-\fBif \fIexpr1 \fR?\fBthen\fR? \fIbody1 \fBelseif \fIexpr2 \fR?\fBthen\fR? \fIbody2\fR \fBelseif\fR ... ?\fBelse\fR? ?\fIbodyN\fR?
-.BE
-
-.SH DESCRIPTION
-.PP
-The \fIif\fR command evaluates \fIexpr1\fR as an expression (in the
-same way that \fBexpr\fR evaluates its argument).  The value of the
-expression must be a boolean
-(a numeric value, where 0 is false and
-anything is true, or a string value such as \fBtrue\fR or \fByes\fR
-for true and \fBfalse\fR or \fBno\fR for false);
-if it is true then \fIbody1\fR is executed by passing it to the
-Tcl interpreter.
-Otherwise \fIexpr2\fR is evaluated as an expression and if it is true
-then \fBbody2\fR is executed, and so on.
-If none of the expressions evaluates to true then \fIbodyN\fR is
-executed.
-The \fBthen\fR and \fBelse\fR arguments are optional
-.QW "noise words"
-to make the command easier to read.
-There may be any number of \fBelseif\fR clauses, including zero.
-\fIBodyN\fR may also be omitted as long as \fBelse\fR is omitted too.
-The return value from the command is the result of the body script
-that was executed, or an empty string
-if none of the expressions was non-zero and there was no \fIbodyN\fR.
-.SH EXAMPLES
-.PP
-A simple conditional:
-.PP
-.CS
-\fBif\fR {$vbl == 1} { puts "vbl is one" }
-.CE
-.PP
-With an \fBelse\fR-clause:
-.PP
-.CS
-\fBif\fR {$vbl == 1} {
-    puts "vbl is one"
-} \fBelse\fR {
-    puts "vbl is not one"
-}
-.CE
-.PP
-With an \fBelseif\fR-clause too:
-.PP
-.CS
-\fBif\fR {$vbl == 1} {
-    puts "vbl is one"
-} \fBelseif\fR {$vbl == 2} {
-    puts "vbl is two"
-} \fBelse\fR {
-    puts "vbl is not one or two"
-}
-.CE
-.PP
-Remember, expressions can be multi-line, but in that case it can be a
-good idea to use the optional \fBthen\fR keyword for clarity:
-.PP
-.CS
-\fBif\fR {
-    $vbl == 1
-    || $vbl == 2
-    || $vbl == 3
-} \fBthen\fR {
-    puts "vbl is one, two or three"
-}
-.CE
-.SH "SEE ALSO"
-expr(n), for(n), foreach(n)
-.SH KEYWORDS
-boolean, conditional, else, false, if, true
-'\" Local Variables:
-'\" mode: nroff
-'\" End: