If/else statements control code flow based on conditions. If/else if/else allows checking multiple conditions before default. Multiple if statements can check conditions independently
Exercises cover basic arithmetic operations and string manipulation. Programs include summation, division, multiplication, and swapping. Exercises involve user input for operations and calculations
PostgreSQL is the most popular database among professional developers. Installation requires downloading from postgresql.org and pgAdmin. Default port is 5432, database name is testdb
Nullable value type T? represents all values of underlying type T plus null. Nullable type is an instance of System.Nullable<T> structure. Underlying type T cannot be nullable value type itself
Console.WriteLine displays output on the console in C#. It serves as a communicator between application and user. Output goes directly to the console application window
Strings in C# are immutable, creating new objects after each operation. String concatenation involves appending one string to the end of another