update

content/courses/prog-intro/homeworks/sum/Sum.java

@@ -14,7 +14,7 @@ public class Sum {
                     // if character is whitespace
                     if (!number.isEmpty()) {
                         // if number is not empty
-                        sum = sum + Integer.parseInt(number.toString()); // add number to sum
+                        sum += Integer.parseInt(number.toString()); // add number to sum
                     }
                     number = new StringBuilder(); // empty the number by creating new empty StringBuilder
                 }
@@ -23,7 +23,7 @@ public class Sum {
             // check for any remaining digits in number
             if (!number.isEmpty()) {
                 // if number is not empty
-                sum = sum + Integer.parseInt(number.toString()); // add number to sum
+                sum += Integer.parseInt(number.toString()); // add number to sum
             }
         }