diff --git a/docs/06-boolean/index.mdx b/docs/06-boolean/index.mdx
index 85a4943..3c8adb5 100644
--- a/docs/06-boolean/index.mdx
+++ b/docs/06-boolean/index.mdx
@@ -51,6 +51,7 @@ document.write(true || false); // true
 let isHunterStrong = false;
 let isMonsterBig = true;
 let shouldFight = isHunterStrong || !isMonsterBig; // false
+document.write(shouldFight);
 ```
 
 ## 比較演算子
@@ -91,6 +92,7 @@ document.write(age === 13); // false
 let age = 12;
 let height = 150;
 let canRideRollerCoasters = age >= 10 && height >= 120; // true
+document.write(canRideRollerCoasters);
 ```
 
 :::tip