diff --git a/out/production/kotlin-study-demo/META-INF/kotlin-study-demo.kotlin_module b/out/production/kotlin-study-demo/META-INF/kotlin-study-demo.kotlin_module
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diff --git a/out/production/kotlin-study-demo/basic/Main.class b/out/production/kotlin-study-demo/basic/Main.class
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diff --git a/out/production/kotlin-study-demo/basic/VariableKt.class b/out/production/kotlin-study-demo/basic/VariableKt.class
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diff --git a/src/basic/variable.kt b/src/basic/variable.kt
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--- /dev/null
+++ b/src/basic/variable.kt
@@ -0,0 +1,66 @@
+package basic
+
+import sun.rmi.runtime.Log
+
+/**
+ * 变量基础定义
+ * 基本数据类型 Int Long Float Double String
+ * 关键字 var 可变变量
+ * 关键字 val 不可变变量
+ * 关键字 变量: 数据类型 = 默认值
+ */
+
+fun main() {
+
+    /**
+     * 可变变量
+     */
+
+    // 定义变量 声明变量类型 并初始化
+    var a: Int = 1
+    a += 6
+    println(a)
+
+    // 不声明类型 自动推断
+    var b = 2L
+    println(b)
+
+    // 未初始化变量值 必须声明变量类型
+    var c: Int
+    c = 3
+    println(c)
+
+    // 打印拼接
+    println("$a + $b + $c")
+
+    /**
+     * 不可变变量(常量)
+     */
+
+    // 声明 初始化
+    val d: Int  = 123
+    // 以下写法或报错 不可变变量不能二次赋值
+    //d += 1
+    println(d)
+    // 双精度整型
+    val i: Long = 6L
+    println(i)
+
+    // 自动推断类型
+    val e = "rainerosion"
+    println(e)
+
+    // 字符串
+    val f: String
+
+    // 单精度浮点数
+    val g: Float = 3.1f
+
+    // 双精度 浮点数
+    val h: Double = 4.0
+    println(h)
+
+    // 不可变字符初始化
+    f = g.toString()
+    print(f)
+}
\ No newline at end of file