C# testing to see if a string is an integer?

Question

I'm just curious as to whether there is something built into either the C# language or the .NET Framework that tests to see if something is an integer

if (x is an int)    // Do something 

It seems to me that there might be, but I am only a first-year programming student, so I don't know.

Answer 1

Use the int.TryParse method.

string x = "42"; if(int.TryParse(x, out int value))   // Do something 

If it successfully parses it will return true, and the out result will have its value as an integer.

Answer 2

If you just want to check type of passed variable, you could probably use:

    var a = 2;     if (a is int)     {         //is integer     }     //or:     if (a.GetType() == typeof(int))     {         //is integer     }