Si, I meant to use oui

Some people will tell you that no means no. In French, however, yes does not always mean yes. You see, in French there are two words for "yes", "oui" and "si". Almost every time you answer a question you will answer "oui".

Examples (with oui)

Apprenez-vous français?                   Are you learning French?
Oui, j'apprends français.                    Yes, I am learning French.

Est-ce que tu as acheté des œufs?     Did you buy eggs?
Oui, j'en ai acheté.                            Yes, I bought some.


Let us now turn to "si". To understand how this word works, let us consider an example in English. Suppose you are hungry but you have not yet taken your lunch brea. Suppose too that someone asks you "Aren't you hungry?". How would you respond in English? Chances are you would say something like "No, I am". You are using the word "no" to contradict the negative question they asked. What I mean by negative question is that the person used the negative, that is the word "not"., If they had asked you "Are you hungry?" that would have been a positive question as the word "not" has not been used to negate any of the verbs.

Coming back to French, we do not use "non" to contradict a negative statement. Instead we use "si", which means "yes". The fact that it means "yes" is not really what you should be focussing on. You should focus on the fact that "si" contradicts a negative question.

Examples

N'apprenez-vous pas français?                  Are you not learning French?
Si, j'apprends français.                              No (literally yes), I am learning French.

Tu n'as pas acheté d'œufs?                        Did you not buy eggs?
Si, j'en ai acheté.                                        No (literally yes), I bought some.