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Why can't I run the codes?

I wrote

function factorial(n) {
    if (n === 0) {
        return 1;
    }
    return n * factorial(n - 1); 
}

console.log(factorial(3));

the codes is calculate factorial.

But I wrote the code in jsfiddle and run, nothing happens. And I wrote html like

<script>
   function factorial(n) {
           ・
　　　　　　 ・
　　console.log(factorial(3));
</script>

and when it is browsed in GoogleChrome,nothing shows in console.I want to see 6 in console.log.6 is calculated by 1*2*3. What is wrong in my codes?How should I fix this?

Solution

  • It runs for me. Try putting your script tag inside <body>.

    <html>
  <head><title>Does it run?</title></head>
<body>
  <h1>Test</h1>

  <script>
  function factorial(n) {
    if (n === 0) {
      return 1;
    }
    return n * factorial(n - 1); 
  }
  console.log(factorial(3));
  </script>

</body>
</html>