Constant - This identifier remains unchanged during a program. It can be a known math or scientific fact., Variable - These identifiers are user input and result of a math calculation., ClrScr - The command to clear screen, Readkey - Stops the program until the user hits a key to continue, Crt - A unit or library in Pascal, Uses - Sets a unit or library to be accessed in Pascal, Readln - An input procedure that tells Pascal to take the data entered and store it., Writeln - An output procedure that displays messages on the screen.,

Pascal Programming Concepts 1

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