PASCAL: Displaying Variables

DISPLAYING THE VALUE OR CONTENTS OF VARIABLES
The write or writeln statement displays the value of variables on the console screen. To print text, enclose inside single quotes. To display the value of a variable, do NOT enclose using single quotes, eg, the following program displays the content of each of the variables declared.


	program DISPLAYVARIABLES (output);
	var     number1 : integer;
	         letter  : char;
	         money   : real;
	begin
	         number1 := 23;
	         letter  := 'W';
	         money   := 23.73;
	         writeln('number1 = ', number1 );
	         writeln('letter  = ', letter  );
	         writeln('money   = ', money   )
	end.

The display output from the above program will be,


	number1 = 23
	letter  = W
	money   = 2.3730000000E+01

SELF TEST 4
Each of the following expressions is wrong. Rewrite each using correct Pascal, in the space provided.


 Firstletter := A;                 ___________________________________

 StartCount:= Initial := 0;        ___________________________________

 Taxrate := 5%;                    ___________________________________

 Total := 5 plus 7;                ___________________________________

 Effeciency := .35;                ___________________________________


Click here for answer

SELF TEST 5
What is displayed by the following program.


	program EXERCISE1 (output);
	var     a, b : integer;
	        c    : real;
	begin
	        a := 1;     b := 5;       c := 1.20;
	        writeln('A = ', a + 3 );
	        writeln('B = ', b - 2 );
	        writeln('C = ', c / 2 )
	end.

Click here for answer

PROGRAM ONE
You are to write a program which calculates and prints on the screen, the time required to travel 3000 miles at a speed of 500 mph.

PROGRAM TWO
Write a program to calculate the gross pay for a worker named FRED given that FRED worked 40 hours at $2.90 per hour.

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