diff --git a/Algorithm/algorithm-ch.md b/Algorithm/algorithm-ch.md
index 4aea4602..6a361938 100644
--- a/Algorithm/algorithm-ch.md
+++ b/Algorithm/algorithm-ch.md
@@ -128,7 +128,7 @@ function sum(a, b) {
 
 ```js
 function checkArray(array) {
-    if (!array || array.length <= 2) return
+    return array && array.length > 2;
 }
 function swap(array, left, right) {
     let rightValue = array[right]
diff --git a/Algorithm/algorithm-en.md b/Algorithm/algorithm-en.md
index b76051ea..2c07e13e 100644
--- a/Algorithm/algorithm-en.md
+++ b/Algorithm/algorithm-en.md
@@ -92,7 +92,7 @@ The following two functions will be used in sorting commonly, so I don't write t
 
 ```js
 function checkArray(array) {
-    if (!array || array.length <= 2) return
+    return array && array.length > 2;
 }
 function swap(array, left, right) {
     let rightValue = array[right]