与否 (yǔ fǒu): whether or not (at the end of a phrase)

Whether this trip is successful depends on whether the weather is good or bad.

Whether he can be admitted still depends on how he performs in the interview or not.

The company decides whether to invest in this project, the key is whether the market prospects are optimistic or not.

Whether we go hiking tomorrow depends on whether it rains or not.

Whether a child can grow up healthily is closely related to whether the family environment is harmonious or not.

Whether he is trustworthy depends on whether he is honest or not.