The program which follows reads two numbers from the keyboard, assigns them to the specified variables, then prints them to the console screen.

	program READDEMO (input, output);

	var     numb1, numb2 : integer;

	begin

	        writeln('Please enter two numbers separated by a space');

	        read( numb1 );

	        read( numb2 );

	        writeln;

	        writeln('Numb1 is ', numb1 , '   Numb2 is ', numb2 )

	end.

When run, the program will display the message

	 Please enter two numbers separated by a space

then wait for you to enter in the two numbers. If you typed the two numbers, then pressed the return key, eg,

	 237  64

then the program will accept the two numbers, assign the value 237 to numb1 and the value 64 to numb2, then continue and finally print

	 Numb1 is 237  Numb2 is 64

---

Differences between READ and READLN
The readln statement discards all other values on the same line, but read does not. In the previous program, replacing the read statements with readln and using the same input, the program would assign 237 to numb1, discard the value 64, and wait for the user to enter in another value which it would then assign to numb2.

The is read as a blank by read, and ignored by readln.

---

SELF TEST on READ
Assuming that we made the following declaration

	 var  C1, C2, C3, C4, C5, C6 : char;

and that the user types

	ABCDE

When variables are displayed, our version of Pascal assigns a specified number of character spaces (called a field width) to display them. The field widths for the various data types are, 
	INTEGER -  Number of digits + 1 { or +2 if negative }

	CHAR    -  1 for each character

	REAL    -  12

	BOOLEAN -  4 if true, 5 if false

Often, the allotted field size is too big for the majority of display output. Pascal provides a way in which the programmer can specify the field size for each output. 


	writeln('WOW':10,'MOM!':10,'Hi there.');

The display output will be as follows, 


	WOW.......MOM!......Hi there.          ... indicates a space.

Note that to specify the field width of text or a particular variable, use a colon (:) followed by the field size. 


	'text string':fieldsize, variable:fieldsize