diff --git a/.idea/awesomeProject.iml b/.idea/awesomeProject.iml
index 5e764c4..7ee078d 100644
--- a/.idea/awesomeProject.iml
+++ b/.idea/awesomeProject.iml
@@ -1,9 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
+<module version="4">
   <component name="Go" enabled="true" />
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
 </module>
\ No newline at end of file
diff --git a/main.go b/main.go
index 2a17224..9ddd365 100644
--- a/main.go
+++ b/main.go
@@ -3,8 +3,19 @@ package main
 import "fmt"
 
 func main() {
-	var a = 100
-	var b int
-	b = 100
-	fmt.Print("a=", a, "b=", b)
+	//	指定变量类型并且赋值
+	var num1 int = 18
+	fmt.Println(num1)
+
+	//	指定变量类型，但不赋值，使用默认值
+	var num2 int
+	fmt.Println(num2)
+
+	//	自动类型推断
+	var num3 = "tom"
+	fmt.Println(num3)
+
+	//	省略var =写为:=
+	num4 := "男"
+	fmt.Println(num4)
 }