title: Numerical issues in R
body: <p>It is a well known fact that when comparing two real numbers it is always better to work with a small tolerance to avoid numerical issues. </p>
  
  <p>I am looking for an example where when we compare a number <code>x</code> having <code>d</code> number of decimal places returns <code>FALSE</code> for the below expression:</p>
  
  <pre><code>round(x, d) == x
  </code></pre>
  
  <p>For example if <code>x=0.1234</code> then <code>d=4</code>. However, this is not a good example as when you evaluate <code>round(x, d) == x</code> returns <code>TRUE</code>. I am looking for a value of <code>x</code> where <code>round(x, d) == x</code> turns to be <code>FALSE</code>.</p>