How to display full output in Jupyter, not only last result?

I want Jupyter to print all the interactive output without resorting to print, not only the last result. How to do it?

Example :

    a=3
    a
    a+1

I would like to display

3
4

Thanks to Thomas, here is the solution I was looking for:

    from IPython.core.interactiveshell import InteractiveShell
    InteractiveShell.ast_node_interactivity = "all"

From: stackoverflow.com/q/36786722