Going to can be used in either clauseA group of related words containing a subject and a verb. of the first conditional and can express prediction or intention.

If you keep acting in such a selfish way, you are going to lose all your friends. (prediction)
If you are going to hurt me, I'll leave. (intention)

Going to can be used for future plans that, at the moment of speaking, have already been decided.

I am going to read this book. (That's why I have borrowed it.)

Going to is used to predict future eventA general term expressing that somebody or something does something or that something happens. E.g.: An apple fell on Isaac’s head.s which are very near. This use is impersonal, i.e. independent of the speaker's opinion. There is usually a sign of the future event in the present.