Calculator delete button?

Question

So I wrote this simple calculator. Is there a way to add a delete button so I can delete the last value entered?

Ex: 1+1
*presses delete button*
1+

https://code.sololearn.com/WXCWgM8w0cjz/#html

Answer 1

Just add
<td><input class="button" type="button" value="DEL" onclick="calculator.display.value = calculator.display.value.substr(0,calculator.display.value.length-1)"></td>

Answer 2

Thanks. And since i'm very new to coding, I was wondering what the "0," means.

Answer 3

this means that you create a new string with the same characters except for the last one.

Answer 4

Now what would be the result if I were to put a 1 there instead? I guess I could have found out myself before typing this, but i'll send it anyway. xD

Answer 5

You then would also remove the first character.

Answer 6

Lol. I figured it out yesterday. Thanks though

Answer 7

I need help with it.