how to make calculator?

Answer 1

you can make a calculator using switch case.
case1: +
case2: -
and so on...
let user input two variables and then choose operation via switch and display result.

Answer 2

Firstly u can simply show the menu in which show what are the choices like addition, subtraction n all.. and ask the user to select the choice like ➕ or ➖.. Then using switch and break u can simply make different cases for ➕, ➖ etc and write down it's logic there.. Then can make a default case for making wrong input..

Answer 3

use arithmetic operation like +,-,*,/,%

Answer 4

You need object oriented programming for that.