title: C - Convert an uppercase letter to lowercase
body: <p>A really simple program. I just want to turn an 'A' into an 'a', but output is giving me 'A'. </p>
  
  <pre><code>#include &lt;stdio.h&gt;
  
  int main(void) {
      putchar(lower('A')); 
  
  }
  
  lower(a) 
  int a; 
  {
      if ((a &gt;= 65) &amp;&amp; (a &gt;= 90))
          a = a + 32; 
      return a;  
  }
  </code></pre>