title: Simple for-loop countdown timer in C
body: <p>This is what the code should do:</p>
  
  <blockquote>
    <p>“Lift off in T minus<br> 5<br> 4<br> 3<br> 2<br> 1<br> Blast-off!”</p>
  </blockquote>
  
  <p>When I run it, it just keeps printing ''Sum = 5'' forever.</p>
  
  <p>Code:</p>
  
  <pre><code>int main(void) {
  
  int sum = 5;  
  int i;     
  
  printf("Lift off in T minus\n");
  
  for (i = 0; i &lt; 5; i=i+i) {
      sum = sum - i;  
      printf("sum = %d\n",sum);  
  } 
  
  printf("Blast-off",sum);  
  
  return 0;
  </code></pre>