diff --git a/files/en-us/web/javascript/reference/global_objects/string/at/index.md b/files/en-us/web/javascript/reference/global_objects/string/at/index.md
index 456b13d325f81ed..fa707af452698cf 100644
--- a/files/en-us/web/javascript/reference/global_objects/string/at/index.md
+++ b/files/en-us/web/javascript/reference/global_objects/string/at/index.md
@@ -34,8 +34,8 @@ The following example provides a function which returns the last character found
 
 ```js
 // A function which returns the last character of a given string
-function returnLast(arr) {
-  return arr.at(-1);
+function returnLast(str) {
+  return str.at(-1);
 }
 
 let invoiceRef = "myinvoice01";