[pure-lang-svn] SF.net SVN: pure-lang: [318] pure/trunk/examples/hello.pure

[<ag...@us...>]

Revision: 318
          http://pure-lang.svn.sourceforge.net/pure-lang/?rev=318&view=rev
Author:   agraef
Date:     2008-06-26 17:24:41 -0700 (Thu, 26 Jun 2008)

Log Message:
-----------
Add 'def' example.

Modified Paths:
--------------
    pure/trunk/examples/hello.pure

Modified: pure/trunk/examples/hello.pure
===================================================================
--- pure/trunk/examples/hello.pure	2008-06-27 00:11:58 UTC (rev 317)
+++ pure/trunk/examples/hello.pure	2008-06-27 00:24:41 UTC (rev 318)
@@ -47,6 +47,12 @@
 // Pattern matching definition with 'let'.
 let x, y = square x, square (x+2); x; y;
 
+// We also have constant definitions using 'def' in lieu of 'let'. These
+// cannot be redefined and are substituted directly into other definitions.
+// Try something like 'foo x = pi*x;' and then 'list foo' to see the
+// difference.
+def pi = 3.14159265358979;
+
 /* Variations on a theme: The factorial. This illustrates various different
    ways to define a simple recursive function. */
 


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