Last time, we learned about default parameters to make functions more flexible. But have you noticed something interesting about variables inside functions versus variables outside them?
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Where exactly do variables "live" in our programs?
Variables created inside a function have local scope. They only exist within that function's curly braces {}. These local variables are "born" when the function is called and disappear when it ends.
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What do you think happens to the result after the function finishes?
Local variables can't be accessed from outside their function. This code would cause an error because result is not defined in the outer scope:
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Why do you think this privacy is a good feature?
Variables created outside of any function have global scope. They can be accessed from anywhere in the program, including inside other functions.
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Can you see how username is available everywhere?
