Hello I am trying to create a calculator but I can not display the result. I first tried to store the return in a variable, then I stored my function in a variable I did an alert() then I did an alert with pipe for my different functions after my switch condition but nothing works.
Here’s the code I made. Can you tell me how to display the result?
let choice = prompt('What operation would you like to do?\n \n 1: Addition\n 2:Soustraction\n 3: Multiplication\n 4: Division');
let firstNumber = parseInt(prompt('write your first number'));
let secondNumber = parseInt(prompt('write your second number'));
let result;
do {
isNaN()
} while (firstNumber, secondNumber);
result = function addition() {
return firstNumber + secondNumber;
}
result = function multiplication() {
return firstNumber * secondNumber;
}
result = function soustraction() {
return firstNumber - secondNumber;
}
result = function division() {
return firstNumber / secondNumber;
}
switch (choice) {
case "1":
addition();
break;
case "2":
multiplication();
break;
case "3":
soustraction();
break;
case "4":
division();
break;
default:
'This number isn\'t in the list'
}
alert(result(firstNumber, secondNumber));
try {
switch (division) {
case secondNumber = 0:
alert('You can\'t split by 0');
}
} catch {
console.error(error.stack);
}I rewrote things a little bit to get it to work. Here was my approach to what you were attempting:
let choice = prompt('What operation would you like to do?\n \n 1: Addition\n 2:Soustraction\n 3: Multiplication\n 4: Division');
function checkFirstNumber(anotherTry = null) {
let bad = true;
let firstIn;
if (anotherTry == null) {
firstIn = prompt('write your first number')
} else {
firstIn = prompt('You did not enter a valid number. Please write your first number.')
}
bad = isNaN(firstIn);
if (bad != false) {
checkFirstNumber(true);
} else {
return parseFloat(firstIn);
}
}
function checkSecondNumber(anotherTry = null) {
let bad = true;
let firstIn;
if (anotherTry == null) {
firstIn = prompt('write your second number')
} else {
firstIn = prompt('You did not enter a valid number. Please write your second number.')
}
bad = isNaN(firstIn);
if (bad != false) {
checkFirstNumber(true);
} else {
return parseFloat(firstIn);
}
}
let firstNumber = checkFirstNumber();
let secondNumber = checkSecondNumber();
let result;
// do {
// isNaN()
// } while (firstNumber, secondNumber);
function addition(inFirst, inSecond) {
return inFirst + inSecond;
}
function multiplication(inFirst, inSecond) {
return inFirst * inSecond;
}
function soustraction(inFirst, inSecond) {
return inFirst - inSecond;
}
function division(inFirst, inSecond) {
return inFirst / inSecond;
}
switch (choice) {
case "1":
result = addition(firstNumber, secondNumber);
break;
case "2":
result = multiplication(firstNumber, secondNumber);
break;
case "3":
result = soustraction(firstNumber, secondNumber);
break;
case "4":
if (secondNumber == 0) {
result = 'You can\'t divide by 0. Please try again.';
} else {
result = division(firstNumber, secondNumber);
}
break;
default:
'This number isn\'t in the list'
}
alert(result);
location.reload();