The first future tense is the future with "will." Use the future with will to talk about an event in the future that you have just decided to do, for predictions and for promises.

Is be going to a future tense?

The expression be going to, followed by a verb in the infinitive, allows us to express an idea in the near future: I'm going to talk to him. Very soon I will talk to him.

Will going to or going to?

Going to is used with predictions. When you are making a decision use will; use going to after the decision has been made. We sometimes also use the present continuous for planned events in the near future. When we want to talk about future facts or things we believe to be true about the future, we use will.