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Task/Documentation/Wren/documentation.wren

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+// The meaning of life!
+var mol = 42
+
+// A function to add two numbers
+var add = Fn.new { |x, y| x + y }
+
+/* A class with some string utilites */
+class StrUtil {
+    // reverses an ASCII string
+    static reverse(s) { s[-1..0] }
+
+    // capitalizes the first letter of an ASCII string
+    static capitalize(s) {
+        var firstByte = s[0].bytes[0]
+        if (firstByte >= 97 && firstByte <= 122) {
+            firstByte = firstByte - 32
+            return String.fromByte(firstByte) + s[1..-1]
+        }
+        return s
+    }
+}
+
+// test code
+var smol = "meaning of life"
+System.print("'%(smol)' + 123       = %(add.call(mol, 123))")
+System.print("'%(smol)' reversed    = %(StrUtil.reverse(smol))")
+System.print("'%(smol)' capitalized = %(StrUtil.capitalize(smol))")