diff --git a/ch01/ex-string.md b/ch01/ex-string.md
index 9b7c56f..b452c7c 100644
--- a/ch01/ex-string.md
+++ b/ch01/ex-string.md
@@ -4,6 +4,7 @@
 
 ```dart
 void main()
+{
 String myVariable  = "I am a string";
 
 String myVariable2 = """