JSFiddle - React, Tailwind, and code Playground

JavaScript

var ask = prompt('add, subtract, multiply, or divide - a,s,m,d: '); 

// get 2 numbers from user 
var number_1 = prompt('Enter the first number: '); 
var number_2 = prompt('Enter the second number: ');

// convert user input into integers 
var intNumber_1 = parseInt(number_1); 
var intNumber_2 = parseInt(number_2);

// do calculation 
if (ask == 'a') {
	document.write(intNumber_1 + intNumber_2); 
} 
else if (ask == 's') {
	document.write(intNumber_1 - intNumber_2); 
} 
else if (ask == 'm') {
	document.write(intNumber_1 * intNumber_2); 
} 
else if (ask == 'd') { 
	document.write(intNumber_1 / intNumber_2);
}