improve CSS on workshop 5

workshop4/Models/Converter.php

@@ -20,6 +20,7 @@ class Converter {
      * @return string Result of conversion
      */
     public function convert(): string {
+        $result = false;
         if (is_numeric($this->number)) {
             $result = $this->number;
             switch ($this->fromUnit) {
@@ -61,9 +62,6 @@ class Converter {
                     break;
             }
         }
-        else {
-            $result = false;
-        }
         return $result;
     }
 }