diff --git a/src/main/scala/practise2/demo/DemoFunction.scala b/src/main/scala/practise2/demo/DemoFunction.scala
index 2eb91a1..692b887 100644
--- a/src/main/scala/practise2/demo/DemoFunction.scala
+++ b/src/main/scala/practise2/demo/DemoFunction.scala
@@ -3,6 +3,7 @@ package practise2.demo
 object DemoFunction {
   def main(args: Array[String]): Unit = {
     hello()
+
     // 简单的函数
     def hello(): Unit = {
       println("Hello Scala")
@@ -17,8 +18,9 @@ object DemoFunction {
     }
     */
     def add(a: Int, b: Int): Int = {
-      a + b  // Scala 不需要显式 return
+      a + b // Scala 不需要显式 return
     }
+
     val result = add(10, 20)
     println(result)
 
@@ -27,9 +29,10 @@ object DemoFunction {
     // 最后一句是什么，就返回什么
     def test(): String = {
       val a = 10
-      println(a)  // 只是打印
-      "Hello"     // 才是返回值
+      println(a) // 只是打印
+      "Hello" // 才是返回值
     }
+
     val resulTest = test()
 
     println("========")
@@ -38,6 +41,7 @@ object DemoFunction {
     def hello2(): String = {
       "Hello"
     }
+
     println(hello2())
     println(hello2) // 也可以省略 ()
 
diff --git a/src/main/scala/practise2/exercises/Exercises1.scala b/src/main/scala/practise2/exercises/Exercises1.scala
index 8a40923..55dbdc4 100644
--- a/src/main/scala/practise2/exercises/Exercises1.scala
+++ b/src/main/scala/practise2/exercises/Exercises1.scala
@@ -1,4 +1,5 @@
 package practise2.exercises
+
 /*
 练习 1：加法函数
 
@@ -15,7 +16,8 @@ println(add(10, 20))
 
 object Exercises1 {
   def main(args: Array[String]): Unit = {
-    print(add(10,20))
+    print(add(10, 20))
   }
+
   def add(a: Int, b: Int): Int = a + b
 }
diff --git a/src/main/scala/practise2/exercises/Exercises3.scala b/src/main/scala/practise2/exercises/Exercises3.scala
index 392cf97..e74ccde 100644
--- a/src/main/scala/practise2/exercises/Exercises3.scala
+++ b/src/main/scala/practise2/exercises/Exercises3.scala
@@ -1,4 +1,5 @@
 package practise2.exercises
+
 /*
 练习 3：判断成年人
 定义：
@@ -15,5 +16,6 @@ object Exercises3 {
   def main(args: Array[String]): Unit = {
     print(isAdult(20))
   }
+
   def isAdult(age: Int): Boolean = age >= 18
 }
diff --git a/src/main/scala/practise2/exercises/Exercises4.scala b/src/main/scala/practise2/exercises/Exercises4.scala
index 4daa126..07f4e4d 100644
--- a/src/main/scala/practise2/exercises/Exercises4.scala
+++ b/src/main/scala/practise2/exercises/Exercises4.scala
@@ -1,5 +1,6 @@
 package practise2.exercises
 
+
 /*
 练习 4：成绩评价
 定义：
diff --git a/src/main/scala/practise2/exercises/Exercises5.scala b/src/main/scala/practise2/exercises/Exercises5.scala
index d6504ff..9be7bff 100644
--- a/src/main/scala/practise2/exercises/Exercises5.scala
+++ b/src/main/scala/practise2/exercises/Exercises5.scala
@@ -1,5 +1,6 @@
 package practise2.exercises
 
+
 /*
 练习 5：计算两个数中的较大值
 定义：