What is an IDE?
An IDE is an interactive development environment, an application that can be used to develop any kind of software programs
If you are an experienced AS400 or iSeries RPG Programmer you are already using an old fashioned IDE. It's called SEU.
The problem is -- SEU is little more than a text editor with a few bells and whistles. SEU has basic line copying functions letting you move lines around and some archaic syntax checking (it hasn't been updated for a decade so ignores all new RPG code layouts). SEU has no code review function. No automatic code insertion. No code reformatting. No highlight of field names in error. It's basic.
Why is a modern IDE better than SEU?
So, without further ado, let's dive in..