RPG Programming

Most IBM i shops still manage source the same way they did in the 1990s — members in source physical…

Every RPG developer eventually writes a program that does something it should not. The calculation is wrong. The loop runs…

Most RPG programs are written to handle the happy path. The file exists, the record is found, the calculation succeeds,…

You already know how to read files with READ and CHAIN. They work. But the moment your query involves a…

Subprocedures let you break logic into reusable blocks inside a single program. Service programs take it further — compile your…

You already write RPG. Free-format does not replace what you know — it removes the straitjacket. No more counting columns,…