Can you spot the conceptual mistake around this conditional statement?

The problem variable is undefinedThere's no else statementThe phone numbers are fakeWe can't compare strings in conditions

Great! The conditional statement is useless because the problem variable is undefined. Else statements are optional and we can compare strings in conditions.

Whoops! The conditional statement is useless because the problem variable is undefined. Else statements are optional and we can compare strings in conditions.