How can I check if the result given by the user is correct using javascript and html

Question

https://code.sololearn.com/W0y4STn3jJUV/?ref=app

Answer 1

store the result in 1 variable, ex:
if(op=='+') result=number1+number2;
if(op=='-') result=number1-number2;
...

then at the end compare the result by user with this result

if(result==resultByUser) //doSomething

Answer 2

Taste wow it was that easy thank you so much