Add examples

examples/factorial.odin

@@ -0,0 +1,20 @@
+import "fmt.odin";
+
+main :: proc() {
+	recursive_factorial :: proc(i: u64) -> u64 {
+		if i < 2 do return 1;
+		return i * recursive_factorial(i-1);
+	}
+
+	loop_factorial :: proc(i: u64) -> u64 {
+		result: u64 = 1;
+		for n in 2..i {
+			result *= n;
+		}
+		return result;
+	}
+
+
+	fmt.println(recursive_factorial(12));
+	fmt.println(loop_factorial(12));
+}