Return blank cell if no value is found

What is the most effective formula to meet those conditions:

1. If the cell value is greater than 1, than return me 0

2. If the cell value is equal to 1, return me 1

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3. If the cell is blank (even though it has some formula inside), return me a blank cell

4. If the cell value is equal to 0, return me a blank cell

Thank you!!

>Solution :

Use OR and nest IF:

=IF(OR(A1={"",0}),"",IF(A1=1,1,0))