We know that computers are machines that process data. All data is stored inside the computer memory (RAM) in variables. The variables are named areas in the memory, which keep a certain data type, for example a number or a text. Each of the variables in C# has a name, a type and a value. Here is how we would declare a variable and assign it with a value at the same time:
After being processed, data is again stored in variables (in somе place in the memory saved for our program).