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author | William Joye <wjoye@cfa.harvard.edu> | 2017-10-17 19:50:58 (GMT) |
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committer | William Joye <wjoye@cfa.harvard.edu> | 2017-10-17 19:50:58 (GMT) |
commit | 9b7a6c3507ea3383c60aaecb29f873c9b590ccca (patch) | |
tree | 82ce31ebd8f46803d969034f5aa3db8d7974493c /tcl8.6/doc/if.n | |
parent | 87fca7325b97005eb44dcf3e198277640af66115 (diff) | |
download | blt-9b7a6c3507ea3383c60aaecb29f873c9b590ccca.zip blt-9b7a6c3507ea3383c60aaecb29f873c9b590ccca.tar.gz blt-9b7a6c3507ea3383c60aaecb29f873c9b590ccca.tar.bz2 |
rm tcl/tk 8.6.7
Diffstat (limited to 'tcl8.6/doc/if.n')
-rw-r--r-- | tcl8.6/doc/if.n | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/tcl8.6/doc/if.n b/tcl8.6/doc/if.n deleted file mode 100644 index 776f811..0000000 --- a/tcl8.6/doc/if.n +++ /dev/null @@ -1,88 +0,0 @@ -'\" -'\" 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: |