Re: Question regarding Mathematica's treatment of whitespace

*To*: mathgroup at smc.vnet.net*Subject*: [mg61845] Re: [mg61795] Question regarding Mathematica's treatment of whitespace*From*: Igor Antonio <igora at wolf-ram.com>*Date*: Tue, 1 Nov 2005 00:39:39 -0500 (EST)*Organization*: Wolfram Research, Inc.*References*: <200510300443.AAA09795@smc.vnet.net>*Reply-to*: igora at wolf-ram.com*Sender*: owner-wri-mathgroup at wolfram.com

Matt wrote: > Hello, > It seems that most of the time Mathematica ignores whitespace. e.g. all of > the following evaluate with no problem: > > Sin [ > Pi/2 > ] > > > Sin [ > > > > Pi/2 > > > > ] > > > However, > > Sin > [Pi/2] > > does not. Is that just the way it is? The reason I ask, is because I > would like to be able to use brackets '[,]' as I do braces in C/C++ to > help show the 'flow' of logic (within larger functions obviously), but > obviously Module[] doesn't work if it sees a cr/lf before the opening > bracket. > > Thanks, > > Matt You're correct that Mathematica ignores most whitespaces, but Mathematica will treat different lines as different expressions, unless there are brackets/parentheses/curly braces/operators/etc that indicate that the content continues on the next line. Here's a similar example: In[13]:= 1 + 1 Out[13]= 2 In[14]:= 1 +1 Out[14]= 1 Out[15]= 1 You have to have something that indicates the expression is not complete on the current line. In your case, you'll have to use the brackets. The way I write to show the "flow" of logic is: f[x_] := Module[{}, ... ] or sometimes f[x_] := Module[{}, ... ] (if I want the name of the function on its own line) When "looking" at the code, I can quickly match the closing bracket of Module with the function f. -- Igor C. Antonio Wolfram Research, Inc. http://www.wolfram.com To email me personally, remove the dash.