Random

Background

Given a file named “pen.json” with:

{
  "type": "application",
  "dependencies": {
    "Core": "pen:///core",
    "Os": "pen:///os",
    "Random": "pen:///random"
  }
}

Generate a random number

Given a file named “main.pen” with:

import Core'Number
import Os'Context { Context }
import Os'File
import Os'Process
import Random'Random

main = \(ctx context) none {
  if m = run(ctx) as none {
    none
  } else {
    Process'Exit(ctx.Os, 1)
  }
}

run = \(ctx context) none | error {
  File'Write(ctx.Os, File'StdOut(), Number'String(Random'Number(ctx.Random)))?

  none
}

When I successfully run pen build

Then I successfully run ./app.