feat: add typescript solution to lc problem: No.2180

No.2180.Count Integers With Even Digit Sum

Author: zhaocchen

solution/2100-2199/2180.Count Integers With Even Digit Sum/README.md

@@ -64,7 +64,15 @@
 ### **TypeScript**
 
 ```ts
-
+function countEven(num: number): number {
+    let ans = 0;
+    for (let i = 2; i <= num; i++) {
+        if ([...String(i)].reduce((a, c) => a + Number(c), 0) % 2 == 0) {
+            ans++;
+        }
+    }
+    return ans;
+};
 ```
 
 ### **...**

solution/2100-2199/2180.Count Integers With Even Digit Sum/README_EN.md

@@ -54,7 +54,15 @@ The 14 integers less than or equal to 30 whose digit sums are even are
 ### **TypeScript**
 
 ```ts
-
+function countEven(num: number): number {
+    let ans = 0;
+    for (let i = 2; i <= num; i++) {
+        if ([...String(i)].reduce((a, c) => a + Number(c), 0) % 2 == 0) {
+            ans++;
+        }
+    }
+    return ans;
+};
 ```
 
 ### **...**

solution/2100-2199/2180.Count Integers With Even Digit Sum/Solution.ts

@@ -0,0 +1,9 @@
+function countEven(num: number): number {
+    let ans = 0;
+    for (let i = 2; i <= num; i++) {
+        if ([...String(i)].reduce((a, c) => a + Number(c), 0) % 2 == 0) {
+            ans++;
+        }
+    }
+    return ans;
+};