diff --git "a/33\350\260\267\345\205\206\346\230\216/\350\200\203\350\257\225.md" "b/33\350\260\267\345\205\206\346\230\216/\350\200\203\350\257\225.md"
new file mode 100644
index 0000000000000000000000000000000000000000..bdf50034b9d1d9b64103245d883a71e88bac9f2d
--- /dev/null
+++ "b/33\350\260\267\345\205\206\346\230\216/\350\200\203\350\257\225.md"
@@ -0,0 +1,55 @@
+```js
+console.log(`======= 第1题 =======`);
+        
+        const arr1 = [1,2,3,4,3]; 
+        function indexOf(arr, item) {
+            if(arr.indexOf(item)>0){
+                return arr.indexOf(item);
+            }else{
+                return -1;
+            }
+        }     
+        console.log(indexOf(arr1,3));
+
+console.log(`======= 第2题 =======`);
+        const arr2 = [ 1, 2, 3, 4 ];
+        var sum = 0;
+        arr2.forEach((e)=>{
+            sum =sum+e;
+        }
+        )
+        console.log(sum);
+        
+console.log(`======= 第3题 =======`);
+        const arr3 =[1, 2, 3, 4];
+        function append(arr, item) {
+            let result =[...arr,item]
+            return result;
+        }
+        console.log(append(arr3,10));
+        
+console.log(`======= 第4题 =======`);
+        const arr1 =[1, 2, 3, 4];
+        const arr2 =['a', 'b', 'c', 1];
+        function concat(arr1, arr2) {
+             var arr3 =arr1.concat(arr2);
+             return arr3;
+        }
+        console.log(concat(arr1,arr2));
+
+console.log(`======= 第5题 =======`);        
+const arr =[1, 2, 3, 4];
+        function square(arr) {
+           var newarr = arr.map((e)=>
+                e*e)
+             return newarr;
+         }
+         console.log(square(arr));    
+         
+console.log(`======= 第6题 =======`);
+        function Fun(r,pi=3.14){
+            return pi*r*r;
+        }
+        console.log(Fun(5));         
+```
+