Onclick event in js

Question

I had create a calculator. I want to use onclick event to enter number in input screen by just clicking button but I couldn't create perfect logic in function.plz help me to solve it out.

https://code.sololearn.com/W8zqhePpIHw3/?ref=app

Answer 1

use dis function in js on this code
https://code.sololearn.com/WKc1bJvyiEq1/?ref=app