diff --git a/20250213.js b/20250213.js
new file mode 100644
index 0000000000000000000000000000000000000000..fa0916ae37eaf061fb198e76187a2e13556e2ce4
--- /dev/null
+++ b/20250213.js
@@ -0,0 +1,73 @@
+for (let i = 0; i < 5; i++) {
+  console.log(i);
+}
+
+let i = 0;
+while (i < 5) {
+  console.log(i);
+  i++;
+}
+
+let i = 0;
+do {
+  console.log(i);
+  i++;
+} while (i < 5);
+
+let score = 85;
+if (score >= 90) {
+  console.log("优秀");
+} else if (score >= 75) {
+  console.log("良好");
+} else if (score >= 60) {
+  console.log("及格");
+} else {
+  console.log("不及格");
+}
+
+let score = 75;
+if (score >= 90) {
+  console.log("优秀");
+} else {
+  console.log("不优秀");
+}
+
+let day = 4;
+switch (day) {
+  case 1:
+    console.log("星期一");
+    break;
+  case 2:
+    console.log("星期二");
+    break;
+  case 3:
+    console.log("星期三");
+    break;
+  case 4:
+    console.log("星期四");
+    break;
+  case 5:
+    console.log("星期五");
+    break;
+  case 6:
+    console.log("星期六");
+    break;
+}
+if (condition) {
+  // 条件为真的代码块
+} else {
+  // 条件为假的代码块
+}
+
+
+switch (expression) {
+  case value1:
+    // 表达式等于value1时执行的代码块
+    break;
+  case value2:
+    // 表达式等于value2时执行的代码块
+    break;
+  // 可以有多个case语句
+  default:
+    // 表达式不等于任何case值时执行的代码块
+}
\ No newline at end of file