What is the meaning of 'only only if and only if' in a conditional sentence?

What is the meaning of 'only only if and only if' in a conditional sentence?

The phrase "only if and only if" in a conditional sentence indicates that a certain condition is necessary and sufficient for another event or situation to occur. It implies that the condition must be met in order for the desired outcome to happen, and there are no other conditions that would lead to the same result.