Changes between Version 1 and Version 2 of ExpressionTour

Timestamp:

06/20/10 04:12:38 (14 years ago)

Author:

Chuck

Comment:

--

ExpressionTour

@@ -1 +1 @@
 = Expression Tour =
 
-This is a "tour" of various kinds of expressions in Cobra. It is not a reference manual for expressions, but is instead intended to help you learn Cobra.
+This is a "tour" of various kinds of expressions in Cobra. It is intended to help you learn Cobra by quickly highlighting some interesting expressions you can write. It is neither a reference nor an exhaustive list of features. It assumes that the reader has basic familiarity with programming.
 
 == Displaying Expression Values ==
@@ -16 +16 @@
 
 You can, of course, use a [wiki:Print] statement. On a related note, you can validate the value of an expression with an [wiki:Assert] statement.
+{{{
+#!python
+print 'My name is', name
+assert x > 0
+}}}
+
+== Arithmetic ==
+
+Arithmetic has the usual infix operators and parentheses for grouping. Note that division with a single slash (/) gives a fractional value. Use a double slash (//) for "integer" division.
+{{{
+#!python
+assert 4 / 5 = 0.8
+assert 4 // 5 == 0
+assert 6 / 5 == 1.2
+assert 6 // 5 == 1
+}}}
+
+Augmented assignment operators can be used to change values:
+{{{
+#!python
+i += 1
+p.x *= 2
+}}}
+
+Underscores can be put in numbers to separate groups of digits for easier reading:
+{{{
+#!python
+big = 10_000_000
+}}}