title: JS: How to add negative numbers in javascript
body: <p>supposing I have variable <code>ex1</code> equal to -20 and variable <code>ex2</code> equal to 50. I try to add it in javascript as <code>alert(ex1+ex2);</code> but it alerts <code>-20+50</code>. I'm really confused with this. THanks for the help, even though it might be a really silly question.</p>