The + operator can be used between strings to combine them. This is called concatenation:
string firstName = "John "; string lastName = "Doe"; string name = firstName + lastName; Console.WriteLine(name); Note that we have added a space after "John" to create a space between firstName and lastName on print.
You can also use the string.Concat() method to concatenate two strings:
string firstName = "John "; string lastName = "Doe"; string name = string.Concat(firstName, lastName); Console.WriteLine(name); C# uses the + operator for both addition and concatenation.
Remember: Numbers are added. Strings are concatenated.
If you add two numbers, the result will be a number:
int x = 10; int y = 20; int z = x + y; // z will be 30 (an integer/number) If you add two strings, the result will be a string concatenation:
string x = "10"; string y = "20"; string z = x + y; // z will be 1020 (a string)
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