What does "e" in "1e-5" in Python language mean and what is the name of this notation?
<p>I notice that there is such an expression "1e-5" in Python(probably in other languages also)</p>

<ol>
<li><p>What is the name of this notation?</p></li>
<li><p>what does it denote in math?</p></li>
<li><p>What does 'e' mean? It's the first time I see a character helps to denote some value, are there other characters also help do so?</p></li>
<li><p>Why should use this way instead of some other python math operation like pow() etc.</p></li>
</ol>