Foundations

The ideas you meet in your first week of ABAP and keep using forever. Each page is one idea, with a program you can run beside it.

Lesson	Level	What it teaches
How long is a string?	201	strlen( ) counts UTF-16 code units, xstrlen( ) counts bytes, and nothing built in counts what a reader would call a character

The row is written by hand; the lesson's output is not. See CONTRIBUTING.md for the shape of a page and how its recorded output gets there.