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src/variables/page.md

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+# Variables
+
+Nimrod supports three different types of variables, `let`, `var`, and `const`. As with most things, multiple variables can be declared in the same section.
+
+``` nimrod
+proc getLetterA(): string =
+  result = ""
+  for letter in 'a'..'z':
+    result.add(letter)
+
+const abcs = getLetterA()
+var
+  foo = "bar"
+  bar = "foo"
+# oops, I need to fix the names
+let temp = foo
+foo = bar
+bar = temp
+
+echo "abcs is ", abcs
+echo "foo is ", foo
+echo "bar is ", bar
+```
+
+```
+$ nimrod c -r ./assignment.nim
+abcs is abcdefghijklmnopqrstuvwxyz
+foo is foo
+bar is bar
+```
+
+A `const` variable is evaluated at compile-time, so if you inspect the C sources, you'll see the following line:
+
+``` C
+STRING_LITERAL(TMP129, "abcdefghijklmnopqrstuvwxyz", 26);
+```
+
+The limitation with `const` is that it cannot interface with C because there is no compile-time foreign function interface at this time.
+
+ `var` variables are the standard mutable variables, you can modify them after they've been assigned. `let` variables are also fairly standard immutable variables. This means you can assign to them at creation time and can't change them later on.