float number is not the expected number after subtraction
<p>I have the following statement:</p>

<pre><code>float diff = tempVal - m_constraint.getMinVal();
</code></pre>

<p><code>tempVal</code> is declared as a float and the <code>getMinVal()</code> returns a float value.</p>

<p>I have the following print out:</p>

<p><strong>diff=0.099999905, tempVal=5.1, m_constraint.getMinVal()=5.0</strong></p>

<p>I expect the <strong>diff</strong> is <strong>0.1</strong> but not the above number. how to do that?</p>
