A real program is not one clever line. It is several simple steps connected end to end: take some input, decide what to do with it, and produce a durable result someone else can use.
The program below is a small but complete claims workflow. It reads two inputs, routes the claim through nested decisions, prints the outcome, and exports a machine-readable result to a file, the kind of artifact an auditor or a downstream system can pick up.
Notice that every branch also records a decision value. The printed line is for a human; the exported value is for a machine. Same program, both audiences.
Run it. Then try days at 120, or the amount below 5000, and watch the routing and the exported result change.
Takeaway
Extraction, validation, routing, output: string those four together and you have a workflow that does real work, readable by the people who own the rules.