# Revision history [back]

### Prevent Sage from executing symbolic computation

Hi.

I would like to ask Sage not to perform a certain symbolic computation until I tell it to. This is because I would like first to show with view the thing I am typing, and then execute it later. So, for instance, I would like something like

sage: view(noexec(sum(1/k^4, k, 1, oo)))


(which should show the summation formula without executing it) and

sage: view(sum(1/k^4, k, 1, oo))


(which should show the result, as it actually does).

Is this possible?