Question: Write a function called counter that, when invoked, always returns a number that is one more than the previous invocation. For instance: counter(); => 1

Write a function called counter that, when invoked, always returns a number that is one more than the previous invocation.

For instance:

counter(); => 1

counter(); => 2

counter(); => 3

HINT: You'll need a variable for this (call it 'count'). Where should the variable be declared?

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