This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

In

In[n]
is a global object that is assigned to have a delayed value of the n^(th) input line.
  • Typing In[n] causes the n^(th) input line to be re-evaluated.
  • In[] gives the last input line.
  • In[-k] gives the input k lines back.
Reevaluate a command without retyping it:
See what commands have been entered in a session:
Get Information for In. Note that here this will only include definitions from this example:
New in 1