feat: add typescript solution to lc problem: No.2011.Final Value of Variable After Performing Operations

Author: zhaocchen

solution/2000-2099/2011.Final Value of Variable After Performing Operations/README.md

@@ -88,6 +88,18 @@ X--：X 减 1 ，X = 1 - 1 = 0
 
 ```
 
+### **TypeScript**
+
+```ts
+function finalValueAfterOperations(operations: string[]): number {
+    let ans = 0;
+    for (let operation of operations) {
+        ans += (operation.includes('+') ? 1 : -1)
+    }
+    return ans;
+};
+```
+
 ### **...**
 
 ```

solution/2000-2099/2011.Final Value of Variable After Performing Operations/README_EN.md

@@ -78,6 +78,18 @@ X--: X is decremented by 1, X = 1 - 1 = 0.
 
 ```
 
+### **TypeScript**
+
+```ts
+function finalValueAfterOperations(operations: string[]): number {
+    let ans = 0;
+    for (let operation of operations) {
+        ans += (operation.includes('+') ? 1 : -1)
+    }
+    return ans;
+};
+```
+
 ### **...**
 
 ```

solution/2000-2099/2011.Final Value of Variable After Performing Operations/Solution.ts

@@ -0,0 +1,7 @@
+function finalValueAfterOperations(operations: string[]): number {
+    let ans = 0;
+    for (let operation of operations) {
+        ans += (operation.includes('+') ? 1 : -1)
+    }
+    return ans;
+};