hello I tried using this code to create a mini currency converter for my assignment but I don't understand why it doesn't work, please let me know why it might be so, thanks.
the error says that newValue has already been defined.
switch (userCurrency)
{
case "USD":
double newValue = userEuro * usd;
break;
case "GBP":
double newValue = userEuro * gbp;
break;
case "CHF":
double newValue = userEuro * chf;
break;
case "AUD":
double newValue = userEuro * aud;
break;
case "CAD":
double newValue = userEuro * cad;
break;
default:
Console.WriteLine("Invalid input!");
break;
}
Instead of declaring newValue inside every case: declare it once (without assigning a value) above the switch, and just assign a value inside each case.
Or maybe use a "switch expression" instead.
define "newValue" before the switch statement:
double newValue;
switch (userCurrency)
{
case "USD":
newValue = userEuro * usd;
break;
...
Extract the newValue declaration outside of the switch case block scope and then assign it inside the different switch cases
double newValue;
switch (userCurrency)
{
case "USD":
newValue = userEuro * usd;
break;
case "GBP":
newValue = userEuro * gbp;
break;
case "CHF":
newValue = userEuro * chf;
break;
case "AUD":
newValue = userEuro * aud;
break;
case "CAD":
newValue = userEuro * cad;
break;
default:
Console.WriteLine("Invalid input!");
break;
}