Обновить 'js1/main.js'

js1/main.js

@@ -39,7 +39,7 @@ b = (c = b/2);
 
 //   if ( age == 0 || isNaN(age)) {
 //     age = prompt('Please writing your age'); console.log(age);
-//   } else if ( age !== nul) {
+//   } else if ( age !== null) {
 //       let yearBirth = yearPresent - age;
 //       alert(yearBirth);
 //     };