diff options
Diffstat (limited to 'doc/expr.n')
| -rw-r--r-- | doc/expr.n | 33 |
1 files changed, 16 insertions, 17 deletions
@@ -6,7 +6,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: expr.n,v 1.24 2007/02/18 18:42:54 dkf Exp $ +'\" RCS: @(#) $Id: expr.n,v 1.25 2007/10/24 14:29:38 dkf Exp $ '\" .so man.macros .TH expr n 8.5 Tcl "Tcl Built-In Commands" @@ -203,9 +203,9 @@ precedence level. For example, the command .CE returns 0. .PP -The \fB&&\fR, \fB||\fR, and \fB?:\fR operators have ``lazy -evaluation'', just as in C, -which means that operands are not evaluated if they are +The \fB&&\fR, \fB||\fR, and \fB?:\fR operators have +.QW "lazy evaluation" , +just as in C, which means that operands are not evaluated if they are not needed to determine the outcome. For example, in the command .CS \fBexpr {$v ? [a] : [b]}\fR @@ -273,8 +273,8 @@ returns 1, while \fBexpr\fR {5 / 4.0} \fBexpr\fR {5 / ( [string length "abcd"] + 0.0 )} .CE -both return 1.25. -Floating-point values are always returned with a ``\fB.\fR'' +both return 1.25. Floating-point values are always returned with a +.QW \fB.\fR or an \fBe\fR so that they will not look like integer values. For example, .CS @@ -338,8 +338,9 @@ unbraced expressions that contain command substitutions. These expressions must be implemented by generating new code each time the expression is executed. .SH EXAMPLES -Define a procedure that computes an "interesting" mathematical -function: +Define a procedure that computes an +.QW "interesting" +mathematical function: .CS proc tcl::mathfunc::calc {x y} { \fBexpr\fR { ($x**2 - $y**2) / exp($x**2 + $y**2) } @@ -379,16 +380,14 @@ Generate a random integer in the range 0..99 inclusive: .CS set randNum [\fBexpr\fR { int(100 * rand()) }] .CE - .SH "SEE ALSO" -array(n), for(n), if(n), mathfunc(n), namespace(n), proc(n), string(n), Tcl(n), while(n) - +array(n), for(n), if(n), mathfunc(n), namespace(n), proc(n), string(n), +Tcl(n), while(n) .SH KEYWORDS arithmetic, boolean, compare, expression, fuzzy comparison - .SH COPYRIGHT -Copyright (c) 1993 The Regents of the University of California. -.br -Copyright (c) 1994-2000 Sun Microsystems Incorporated. -.br -Copyright (c) 2005 by Kevin B. Kenny <kennykb@acm.org>. All rights reserved. +.nf +Copyright \(co 1993 The Regents of the University of California. +Copyright \(co 1994-2000 Sun Microsystems Incorporated. +Copyright \(co 2005 by Kevin B. Kenny. All rights reserved. +.fi |