Function Graph with Recursion

A logic.function node ("factorial") authored in blueprint mode — a nested visual node graph instead of hand-typed code — using controlFlow.branch to guard against the base case and a recursive logic.functionCall with callKind: "sameFile" to call itself.

Nodes involved (inside the function's nested graph): logic.graphEntry, controlFlow.branch, operators.subtract, operators.multiply, recursive logic.functionCall, logic.graphReturn. On the main canvas: the same logic.function node (private — never wired to an Export, so it stays a file-local helper), called directly by name from a handler.customCode node.

The nested graph: Start (parameter: n) → Branch (condition n <= 1) → True arm returns 1 (base case); False arm computes n - 1, calls factorial() recursively with that value, multiplies the result by n, and returns that. Each recursive call's result flows through naturally — no variables needed to shuttle values between branches.

Generated server.js

const express = require("express");

const app = express();

function factorial(n) {
  if ((n <= 1)) {
    return (1);
  } else {
    const _sub = ((n) - (1));
    const rec = factorial(_sub);
    const _mul = ((n) * (rec));
    return (_mul);
  }
}

app.use(express.json());

app.get("/factorial", (req, res) => {
  const n = Number(req.query.n ?? 0);
  res.status(200).json({ n, factorial: factorial(n) });
});

app.listen(3005, () => {
  console.log("Server running on port 3005");
});

Run it

npx visual-node examples/05-function-graph-recursion

curl "http://localhost:3005/factorial?n=5"   # {"n":5,"factorial":120}
curl "http://localhost:3005/factorial?n=1"   # {"n":1,"factorial":1}
curl "http://localhost:3005/factorial?n=0"   # {"n":0,"factorial":1}
curl "http://localhost:3005/factorial?n=10"  # {"n":10,"factorial":3628800}