diff options
Diffstat (limited to 'doc/for.n')
| -rw-r--r-- | doc/for.n | 35 |
1 files changed, 19 insertions, 16 deletions
@@ -5,14 +5,12 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: for.n,v 1.4 2004/05/05 22:08:10 dkf Exp $ -'\" -.so man.macros .TH for n "" Tcl "Tcl Built-In Commands" +.so man.macros .BS '\" Note: do not modify the .SH NAME line immediately below! .SH NAME -for \- ``For'' loop +for \- 'For' loop .SH SYNOPSIS \fBfor \fIstart test next body\fR .BE @@ -50,13 +48,15 @@ expression is evaluated (before each loop iteration), so changes in the variables will be visible. See below for an example: .SH EXAMPLES +.PP Print a line for each of the integers from 0 to 10: +.PP .CS -for {set x 0} {$x<10} {incr x} { - puts "x is $x" +\fBfor\fR {set x 0} {$x<10} {incr x} { + puts "x is $x" } .CE - +.PP Either loop infinitely or not at all because the expression being evaluated is actually the constant, or even generate an error! The actual behaviour will depend on whether the variable \fIx\fR exists @@ -64,21 +64,24 @@ before the \fBfor\fR command is run and whether its value is a value that is less than or greater than/equal to ten, and this is because the expression will be substituted before the \fBfor\fR command is executed. +.PP .CS -for {set x 0} $x<10 {incr x} { - puts "x is $x" +\fBfor\fR {set x 0} $x<10 {incr x} { + puts "x is $x" } .CE - +.PP Print out the powers of two from 1 to 1024: +.PP .CS -for {set x 1} {$x<=1024} {set x [expr {$x * 2}]} { - puts "x is $x" +\fBfor\fR {set x 1} {$x<=1024} {set x [expr {$x * 2}]} { + puts "x is $x" } .CE - .SH "SEE ALSO" -break, continue, foreach, while - +break(n), continue(n), foreach(n), while(n) .SH KEYWORDS -for, iteration, looping +boolean, for, iteration, loop +'\" Local Variables: +'\" mode: nroff +'\" End: |