confusion with float datatype
<p>I understand the integer range but i cannot know how float works</p>

<p>Range 3.4 e-38 to 3.4 e+38 (7 significant digits)</p>

<p>The range of float would be 0.000000000000000000000000000000000000034 to 340000000000000000000000000000000000000</p>

<p>how are 7 significant digits calculated?</p>
