# What is the meaning of “Introduced in …” and “Updated in …”?

I am looking at the documentation of a Mathematica function and at the bottom it says Introduced in 1988 (1.0) | Updated in 1996 (3.0).

What exactly does this mean? Is it safe to assume that the function has not changed since version 3.0 and in particular produces the same output?

• I "updated" this should really be interpreted only in the way that the interface has changed (like new options or a an additional calling pattern). Some functions like Integrate experience many minor changes under the hood; I doubt that the documentation is updated each time when this happens. But, of course, I could be wrong. – Henrik Schumacher Apr 14 '20 at 16:12