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Before you can re - assign a variable's value, what must you do ? Select an answer: Nothing needs to be done before you re

Before you can re-assign a variable's value, what must you do?
Select an answer:
Nothing needs to be done before you re-assign a variable's value.
Re-declare the variable as a specific data type.
Ensure that the old data is saved in a new variable.
Reset the variable's data to zero or the null character.

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