# Are calculus and real analysis the same thing?

1. I guess this may seem stupid, but
how calculus and real analysis are
different from and related to each
other?

I tend to think they are the same
because all I know is that the
objects of both are real-valued
functions defined on $\mathbb{R}^n$,
and their topics are continuity,
differentiation and integration of
such functions. Isn’t it?

2. But there is also
$\lambda$-calculus, about which I
honestly don’t quite know. Does it
belong to calculus? If not, why is
it called *-calculus?
3. I have heard at the undergraduate course level, some people mentioned the
topics in linear algebra as
calculus. Is that correct?

Thanks and regards!