diff --git a/examples/arithmatic.cpp b/examples/arithmatic.cpp
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/data_types.cpp b/examples/data_types.cpp
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/if_else.cpp b/examples/if_else.cpp
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/loop.cpp b/examples/loop.cpp
new file mode 100644
index 00000000..e69de29b
diff --git a/examples/string_formatting.cpp b/examples/string_formatting.cpp
index 8a25d3d9..cb0982ed 100644
--- a/examples/string_formatting.cpp
+++ b/examples/string_formatting.cpp
@@ -33,25 +33,22 @@ int main(){
     vm->exec("print('{{{0}}}'.format(1))");
 
     vm->exec("print('{0}{1}{1}'.format(1, 2, 3))");
+    // vm->exec("\
+    // try: \
+    //     print('{0}={1}}'.format(1, 2)) \
+    // except ValueError: \
+    //     print('ValueError')"
+    // );
+
+    vm->exec("try:\n");
+    vm->exec("    print('{0}={1}}'.format(1, 2))\n");
+    vm->exec("    exit(1)\n");
+    vm->exec("except ValueError:\n");
+    vm->exec("    print('ValueError')\n");
 
-    vm->exec("try:");
-    vm->exec("@indent print('{0}={1}}'.format(1, 2)')");
-    vm->exec("    exit(1)");
-    vm->exec("except ValueError:");
-    vm->exec("    print('ValueError')");
     vm->exec("print('{{{}xxx{}x}}'.format(1, 2))");
     vm->exec("print('{{abc}}'.format())");
 
-// assert "{{{}xxx{}x}}".format(1, 2) == "{1xxx2x}"
-// assert "{{abc}}".format() == "{abc}"
-    // cjson loads and dumps!
-    // vm->exec("import cjson");
-    // vm->exec("dict = {'a': 1, 'b': [1, 3, 'Hello World'], 'c': {'a': 4}, 'd': None, 'd': True }");
-    // vm->exec("json_str = cjson.dumps(dict)");
-    // vm->exec("print(json_str)");
-    // vm->exec("loaded_dict = cjson.loads(json_str)");
-    // vm->exec("print(loaded_dict)");
-
     delete vm;
     return 0;
 }