i see no difference between will and going to with "be a doctor"

Using "will" makes it slightly more "definitely going to happen", using "going to be" is slightly more "this is the current plan". Functionally, they are interchangeable. It's mostly nuance. *Oh, no! We are out of milk!* *Don't worry, I will go to the store after work.* (Essentially a promise to go to the store) *Oh, no! We are out of milk!* *Don't worry, I am going to the store after work.* (There was probably already a plan to go to the store) In either case above, you are going to the store after work. As long as you bring back milk, everyone will be happy.

I feel you can use either option in most cases. There is only a slight difference in meaning. That said, * "I will" emphasizes you're certain about the future event. Like "I will NOT fail to become a doctor". * "I am going to" emphasizes your intent or desire, more than the probability of the outcome. The first one would probably not be as common. It could be said in answer to "What profession will you have in 5 years". The second one is more like what a young person would say about their future dreams. I perceive it as slightly less formal as well. The more common type of phrase you'd hear would be something like "I'm studying to become a doctor." I hope that helps.

Fundamentally they mean the same thing. But I think using "will" has a lot more impact to it. Something like "despite all my setbacks, I will be a doctor"

No real difference between the two. That's why you're getting contradictory answers in these comments. I think maybe in casual speech we use "going to be" more often. But that's about flow and how it sounds, not meaning.

"I will be a doctor" by itself sounds more insistent. Like, "I have firmly decided that I will be a doctor or die trying" If you just say "I'm going to be a doctor" sounds like you have a plan to be a doctor. "I'm going to be a doctor when I grow up" is a very reasonable plan for a kid to make. You might say "I will be a doctor in June, when my residency is complete" That is, you definitely will be a doctor if you complete you residency (I don't actually know how becoming a doctor works). "I'm going to be a doctor be a doctor in June ..." would have basically the exact same sense in this context. But "I'm going to be a doctor in 5 years" sort of admits the possibility that something could go wrong, whereas "I will be a doctor in 5 years" is more certain.

"I will be a doctor" needs something else after it. Like "I will be a doctor in 5 months when I finish my degree"

If you can add just or then, or if, use will.

Virtually no zero difference without any other context.

Will is used for spontaneous decisions, promises, and predictions. Going to is used for future plans and predictions with present evidence So “I will be a doctor” could be a prediction or a promise. And “I’m going to be a doctor” could be your current plan or you could be holding the acceptance letter in your hands saying what’s going to happen

We can use "will"when we want to do sth in future immediately.for example door is open and you say ,I wiil close rhe door.whereas "going to" is used when you plan on doing sth in future.forexample:I'm going to emmigrate next year.

Native speaker and English teacher here. To me, there is no difference.

I don’t think there’s much difference, but to me “going to be” has a connotation of wanting to/planning to become a doctor, while “I will” seems more plain and just like the end result is that I am a doctor.

A lot of comments here saying they're the same or that "will" is stronger or something - not correct. They're both used to talk about the future but in different situations. Here's the breakdown: will - used for offers, promises and instant/sudden decisions. be going to - used for talking about personal plans and intentions that you have already decided (not instant decisions) You can use either "will"or "be going to" for predictions (saying what you think will happen). In this case, "be going to" is slightly stronger, used when something is almost certainly going to happen. "I'm going to be a doctor" is correct, because people don't usually decide their career plans suddenly while having a conversation about it. So it's not an instant decision. It's something they have thought about before and decided. Using "will" to talk about intentions that you have already decided is something that non-native speakers often do by mistake, and native speakers pretty much never do, even though they might not be conscious of it. Even in formal speech, native speakers use "be going to" to talk about their intentions. But the meaning has shifted over time - "will" was used differently in the early 20th century, which may be why some native speakers could think it sounds formal.

What do you mean you see no difference? You understand that you are on the Internet and you can just google the difference and read about it? Regular native speakers won't see much difference because it isn't huge. Also, in every day speech people don't care that much about grammar. And finally, yes, in the first person, when talking about your own future plans the difference is indeed minute. "Going to" structure is used when some preparation has already been done. In other words, things have been done towards that goal. "Will" is used for more spontaneous statements, as well as statements that are mostly based on your thoughts and no tangible evidence in the real world. To point out some practical contexts these differences may matter in: "I am going to be a doctor" implies that the person is already doing something towards reaching the end goal. Maybe they are at med school, maybe they started studying biology more extensively in high school. Maybe they just bought some books about how to become a doctor. "I will be a doctor" is just a statement on what you plan to do in your life. It conveys nothing about the state of your preparation to reach that goal.

I tell my ESL students that "will" is never wrong for a future statements. BUT it is not always the best. As a student's English level improves, they can add extra meaning to their sentences, just as native speakers do. "Going to" shows that it is your intention. Using the present continuous for the future shows that you've already started to do something to make that plan real; "about to" tells the listener it will happen very soon. And so on.

I don't find them to be significantly different in intensity. It's a difference of construction. "Will" in "will be" is an auxiliary verb indicating future-ness, applied to to the verb "be" a verb indicating state. "Going to be" involves the word "going" which is much more metaphorical in describing the future-ness of the situation. Going is traveling, moving, physical transport as a metaphor for motion through time in the way "will be" doesn't have. "Will be X" and "going to be x" are dry/matter-of-fact and more metaphorical/colorful respectively while accomplishing the same function of meaning.

Will is more certain. That’s it. Don’t get lost in the details; native speakers don’t make huge distinctions between those two. They’re quite similar, just a minor bump in certitude.

"Will be" is certain, "going to be" is more like a plan.

There is no difference in meaning. Will is more formal, going to is more colloquial. I would say will has more determination in it but it really has everything to do with context and tone when saying it.