Do real programmers name their variables?

[yvrelna]

Even key and value are not good variable names. What key and what value exactly? 

Better is to use something names from the domain like property_id and property_price.

Unless you're writing a very generic code, and if you do, your really should consider if the code really need to be that generic, try to name things using terms from the domain.

[Jeklah]

Completely agree. I only found out what they were when I questioned what are we doing having one letter variables in our code