Updated solution.md

the function sumInput() needs return statement (added now at line 23) so that the alert(sumInput()) shows correct output (now on line 26).

1-js/05-data-types/04-array/5-array-input-sum/solution.md

@@ -20,6 +20,7 @@ function sumInput() {
   for (let number of numbers) {
     sum += number;
   }
+  return sum;
 }
 
 alert( sumInput() );