If we don't initialize a variable, its value can be very unpredictable. That sounds like trouble, doesn't it?

Whoa! It looks like this shortcut doesn't initialize age. Uninitialized variables are dangerous because they have values that we can't predict.

Psst: using uninitialized variables is a common mistake that can lead to serious issues.

Let's see what happens when we try to assign the variables to a value here.