title: c for looping with i and j
body: <p>I'm beginer and I'm trying to understand this guys,if someome could explain me this I'd be grateful.</p>
  
  <p>so here's the code:</p>
  
  <pre><code>#include&lt;stdio.h&gt;
  
  int main( void ) {
     int i, 
         j, 
         a = 2, 
         b = 2;
  
     for( i = 1; i &lt; 3; i++ ) {
        for( j = 3; j &lt; 5; j++ ) {
           a = a + b;
        }
     }
  
     printf( "a=%d", a );
  }
  </code></pre>