What is the difference in the operations?

Question

Operation 1
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var a = 1
++a
print("a")
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************
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Operation 2
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var a = 1
a++
print("a")
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Answer 1

In your case there is not.
(Are you sure there is quotes around a ?)
If you want to see a difference, try to put operation directly in your "print".
Look:
var a = 1
print(a++) //Output: 1
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var a = 1
print(++a) //Output: 2
In the first case, the operation is did after the value is display.
In the second, the operation is did before.
Hope I could help despite my english level ;)

Answer 2

Thanks for this explanation I knew the answer but not the process of how the answer came.