FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Before we move on, you should be aware that there are five types of variables. Constants, global variables, class variables, instance variables, and local variables.

Detailed explanation-2: -What is a variable? In programming, a variable is a value that can change, depending on conditions or on information passed to the program. Typically, a program consists of instruction s that tell the computer what to do and data that the program uses when it is running.

Detailed explanation-3: -In computing, a command is a directive to a computer program to perform a specific task. It may be issued via a command-line interface, such as a shell, or as input to a network service as part of a network protocol, or as an event in a graphical user interface triggered by the user selecting an option in a menu.

Detailed explanation-4: -Use the ASSIGN Command. This command assigns an expression result or the field value to a variable. Variables are usually created with the DEFINE command and assigned a value.