title: How do I solve this error "not all code paths return a value"
body: <p>The <code>setSpeedX</code> was underlined for the error "not all code paths return a value". May I know how do I solve it? The codes are as below:</p>
  
  <pre><code>class Ball
  {
      public int speedX { get; private set; }
      public int speedY { get; private set; }
      public int positionX { get; private set; }
      public int positionY { get; private set; }
  
      public Ball(int speedX, int speedY, int positionX, int positionY)
      {
          this.speedX = speedX;
          this.speedY = speedY;
          this.positionX = positionX;
          this.positionY = positionY;
      }
  
      public int setSpeedX(int newSpeedX)
      {
          speedX = newSpeedX;
      }    
  
      public int setSpeedY(int newSpeedY)
      {
          speedY = newSpeedY;
      }
  
      public int setPositionX(int newPositionX)
      {
          positionX = newPositionX;
      }
  
      public int setPositionY(int newPositionY)
      {
          positionY = newPositionY;
      }
  }
  </code></pre>
  
  <p>Thank you.</p>