CSCI 150

Variables

Example:

	program songs;
	var
		favoriteSong: string;
	begin
		writeln('What is your favorite song?');
		readln(favoriteSong);
		writeln('I love ', favoriteSong, ' too!');
	end.

Naming variables:

• Do not use spaces
• Use only letters, numbers and underscore
• Must start with a letter.

Variable types:
The type of a variable tells the compiler what kind of information is stored in memory.

Type	Kind of info	Uses
string	text (string of letters and/or numbers)	Write to monitor or Read from keyboard
integer	integer number (1, 17, -37, etc.)	Arithmetic operations +, -, *, /
real	decimal number (2.5, 0.7, -314.2, etc)	arithmetic operations

Assigning values to a variable:
Variables can be assigned values with readln( ) or using the assignment operator, :=

Example:

	program dogInformation;
	var
		ageOfDog: integer;
		nameOfDog: string;
	begin
		ageOfDog := 12;
		nameOfDog := 'Patches';
		writeln(nameOfDog, ' is ', ageOfDog, ' years old.');
	end.