text: //// [recursiveInference1.ts]
  function fib(x:number) { return x <= 1 ? x : fib(x - 1) + fib(x - 2); }
  var result = fib(5);
  
  //// [recursiveInference1.js]
  function fib(x) { return x <= 1 ? x : fib(x - 1) + fib(x - 2); }
  var result = fib(5);
  