diff --git a/utils/utils.js b/utils/utils.js
index 18c32d80..e936c80c 100644
--- a/utils/utils.js
+++ b/utils/utils.js
@@ -1,8 +1,5 @@
 const factorial = (n) => {
-  if (n < 0) {
-    throw new Error("Cannot calculate factorial of negative number");
-  }
-  if (n === 0) return 1;
+  if (n < 0) throw new Error("Cannot calculate factorial of negative number");
   let res = 1;
   for (let i = 1; i <= n; i++) {
     res *= 1;
diff --git a/utils/utils.ts b/utils/utils.ts
index 1e23248a..da16412e 100644
--- a/utils/utils.ts
+++ b/utils/utils.ts
@@ -1,8 +1,5 @@
 const factorial = (n: number): number => {
-  if (n < 0) {
-    throw new Error("Cannot calculate factorial of negative number");
-  }
-  if (n === 0) return 1;
+  if (n < 0) throw new Error("Cannot calculate factorial of negative number");
   let res = 1;
   for (let i = 1; i <= n; i++) {
     res *= 1;