title: Error cannot find symbol
body: <p>I making a class and for some reason there is the error "cannot find symbol" for</p>
  
  <pre><code>perimeter = width + length;
  return perimeter;
  </code></pre>
  
  <p>I am not sure why an error should occur here (or whether there is something else wrong with my code. I just started java in school so any tips would be helpful. </p>
  
  <pre><code> /**
   * A rectangle has a length and a width.  Its perimeter can be calculated.
   */
   public class Rectangle
  {
  private int length;
  private int width;
  
  /**
   * Constructs a rectangle with a specified length and width
   * @param len the length of the rectangle
   * @param wid the width of the rectangle
   */
  public Rectangle(int len, int wid )
  {
      length = 0;
      width = 0;
  }
  
  /**
   * Sets the length and width of the rectangle
   * @param len the new length
   * @param wid the new width
   */
  public void setDimensions(int len, int wid)
  {
      length = len;
      width = wid;
  }
  
  /**
   * Returns the perimeter of the rectangle
   * @return the perimeter of the rectangle
   */
  public int calculatePerimeter( )
  {
      perimeter = width + length;
      return perimeter;
  }
  </code></pre>