diff --git a/src/basic/flow-control.md b/src/basic/flow-control.md
index f290c105..70000e92 100644
--- a/src/basic/flow-control.md
+++ b/src/basic/flow-control.md
@@ -14,6 +14,8 @@ if condition == true {
 } else {
     // B...
 }
+```
+
 该代码读作：若`condition`条件为`true`，则执行`A`代码，否则执行`B`代码.
 
 先看下面代码：