# Google Code Prettify

I just installed the Google code prettify library on Nounoublog.

It's a very small and
simple Javascript library to *pretty print* code.
Pretty printing is of course formatting code to make it look good
and easier to understand, identifying language keywords, constants, etc.
The Google code prettify library supports a wide variety of languages,
including C, Java, Python, Bash, SQL, HTML, Javascript, etc. Even with
the default configuration it generates snippets that are very nice
looking. For example:

```
# Computes the hailstone sequence of an input number
# and prints how many iterations it takes to reach 1.
# For more info see <a href="http://en.wikipedia.org/wiki/Collatz_conjecture">http://en.wikipedia.org/wiki/Collatz_conjecture</a>
import sys
def iterate_hailstone(n):
if n % 2 == 0:
return n / 2
else:
return 3 * n + 1
if __name__ == '__main__':
n = int(input('Introduce a natural number: '))
if (n < 1):
sys.exit('You need to learn what a natural number is.')
num_iterations = 0
while n > 1:
print n
n = iterate_hailstone(n)
num_iterations = num_iterations + 1
print 'Converged in %d iterations' % num_iterations
```

Or more succinctly:

```
while(n > 1): n = (n%2) * (3*n+1) + (1 - n%2) * (n/2); n;
```

Installing the library was painless. Also, it seems very quick to load. The complete instructions are here.

PS. Does the program finish for all natural numbers?