Identify and perform actions to data within stated limits

[Terry Reedy]

<dasacc at gmail.com> wrote in message 
news:1109716785.000019.231610 at o13g2000cwo.googlegroups.com...
> I found the len(*) obscurely mentioned on someones webpage.

*All* the built functions are prominently listed and described in Library 
Reference 2.1Built-in Functions.  I urge you and any beginner to at least 
read the whole of chapter 2.

Terry J. Reedy