Hava Language Tutorial

Pascal's Triangle illustrates an important feature of Hava:
indexed values are stored when calculated, and retrieved upon subsequent requests.

In other words, an indexed variable may look like a function, but it acts more like a repository of numbers.
In this respect, indexed variables resemble the cells of a spreadsheet.

Because of this feature, calculating the first 10 rows of Pascal's triangle requires 45 additions.
If C(n,k) had been implemented as a function, it would have required 1013 additions.
(We used Hava to get this number. Can you?)