# Verbose Printing

There is one verbose printing variable, called `"LSeries"` that controls verbose printing for all of the functions in this chapter.

```
> SetVerbose("LSeries",n);

```

It accepts verbosity levels $n$ such that $0\le n\le 3$. The values are as follows:

$n=0$ is the (default) quiet mode. The functions do not print anything apart from loss-of-precision warnings.

$n=1$ is possibly the most useful setting. The sign and the residues of $L^*(s)$ are printed whenever they are determined from the functional equation.

$n=2$ generates messages that allow the user to keep track of what is currently happening. So messages are printed when a new $L$-function is constructed, when coefficients are generated or when expansions of special functions are computed.

$n=3$ is a “keep-alive” setting that basically informs the user that the computer has not crashed yet and, yes, something is still happening. For $L$-functions of large conductor or very high precision that require a large number of coefficients, Magma will print a “progress indicator” every time 1000 new coefficients are generated and every 5000 terms in the series computations that test the functional equation or compute the $L$-values. (The frequencies 1000 and 5000 are stored in the attributes `L`vprint_coeffs` and `L`vprint_series` of a variable `L` of type `LSeries` and may be changed at the user’s desire.)