How to edit the code so that it won't crash if char or strg was inputted into the console ?

Question

do {
Console.Write("x = ");
int x = Convert.ToInt32(Console.ReadLine());

Console.Write("y = ");
int y = Convert.ToInt32(Console.ReadLine());

int sum = x+y;
Console.WriteLine("Result: {0}", sum);
}
while(true);

//courtesy of Sololearn

Answer 1

you can use TryParse function that is return a result of parsing the string if available or not , but without crash

string value1 = Console.ReadLine();
int intValue1;
bool isParsed = int.TryParse(value1, out intValue1);

string value2 = Console.ReadLine();
int intValue2;
bool isParsed2 = int.TryParse(value2, out intValue2);

if (isParsed== false || isParsed2==false)
Console.WriteLine("Only numbers are valid.");

Answer 2

Try it:
do {
Console.Write("x = ");
String sx = Console.ReadLine();

Console.Write("y = ");
String sy = Console.ReadLine();
if(Regex.IsMatch(sx, @"^\d+quot;) && Regex.IsMatch(sy, @"^\d+quot;)) {
int x = Convert.ToInt32(sx);
int y = Convert.ToInt32(sy);
int sum = x+y;
Console.WriteLine("Result: {0}", sum);
}
}
while(true);