Example of using string concatenation in different ways.
string str = "100: " + 50 + 50;
Console.WriteLine(str); // 100: 5050
string str1 = "100: " + (50 + 50);
Console.WriteLine(str1); // 100: 100
Console.WriteLine("50 + " + 50 + " = 100"); // 50 + 50 = 100
Console.WriteLine("c" + "a" + "t"); // cat