title: How can i write, "if not greater than or equal to some value" eloquently?
body: <p>I am reading, <em>Programming: Principle and Practice Using C++</em>, and Bjarne suggest avoiding overuse of parentheses. Is there an eloquent way to structure the following if statement? Here is my code:</p>
  
  <pre><code>bool is_valid(string s)
  { 
        if(!(s.size()&gt;=8)) throw invalid_argument("Username must be 8 char or more");
        return true;
  }
  </code></pre>