title: error: identifier "sytem" is undefined
body: <p>I have just started to learn C language and I'm just trying to write Hello World to get started but I get this error message.  I'm sure the answer is obvious but can someone please tell me what I need to do?  This is my code:</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  
  int main()
  {
  printf("Hello World ");
  system("Pause");
      return 0;
  } 
  </code></pre>