Variable Addition?

Question

So I'm not that good at coding and I made a simple calculator, everything else works other than addition, it wont mathematically add the numbers together (ex. 1+1 = 11 other than 2)
Heres the code:

function Calc(){
var Var1 = prompt("What is the first digit of your equation?");
var Symbol = prompt("What is the mathematic symbol you are using for the equation? (/ for divison *for multiplication + for addition - for subtraction)");
var Var2 = prompt("What is the second digit of the equation?");
if (Symbol == "/"){
alert(Var1 / Var2);
}
if (Symbol == "*"){
alert(Var1 * Var2);
}
if (Symbol == "+"){
alert(Var1 + Var2);
}
if (Symbol == "-"){
alert(Var1 - Var2);
}
}
Calc();

If any of you know how to fix this please tell me. (The simplest help best)

Answer 1

When one of the operators is a string and you use +, JS thinks you want to concatenate the strings.

The remedy is to explicitly convert the strings into numbers using the function parseFloat.

Here's how it works:

https://www.w3schools.com/jsref/jsref_parsefloat.asp

Answer 2

I would also suggest using meaningful variable names and following some conventions.

use camel case and avoid naming vars like var1 etc

Also another suggestion - ask user for operation first - then insert both numbers.

Answer 3

Prompt always return a string, so you have to use Number(prompt()); to get a number type.