1. Written by Al.So. Software solutions
Pascal Programming
Written by Al.So. Software solutions

2. Simple Program 1
begin
end.

3. Simple Program 2 program Test; uses wincrt; begin
writeln(‘Good Afternoon!’);
end.

4. Simple Program 2
Results:

5. Reserverd Words
These are the common reserved words of pascal program. You cannot use this as a variable name.
begin end program var string if then else for to downto while do repeat until procedure function in

6. Program Title
program Test; {This is the program title(you can omit it)}
begin
{Main Body}
end.

7. Additional explanation
Data type
These are the common data type of pascal program.
Type
Explanation
Additional explanation
Example
integer
Whole numbers
3, 104, 0, -9
string
String variable
(Text)
'Hello World', '456,4'
char
Character
(One character)
'b', 'A', '7'
boolean
Boolean variable
Can only be True or False
True, False
real
Real numbers
(Floating point numbers)
4.0, -0.08, 48.6, 2.0E4

8. Declaring variable program Test; var i : integer; var s : string;
var c : char;
var b : boolean;
var r : real;
begin
{Main Body}
end.

9. Declaring variable program Test; Uses wincrt; var i : integer;
s : string;
c : char;
b : boolean;
r : real;
Begin
I := 0;
Writeln(i);
end.

10. Using Library program Test;
uses wincrt; {Wincrt is a common library in turbo pascal for i/o manipulations wincrt.tpu}
var i : integer;
begin
{Main Body}
end.

11. Using Variables program Test; uses wincrt; var i : integer; Begin
Readln(i);
writeln(i);
end.

12. Using Variables
Results:

13. Using Variables program Test; uses wincrt; var i : integer;
j : integer;
begin
i := 7;
j := 3;
i := i + j;
writeln(i);
end.

14. Using Variables
Results:

15. Comparing VB with Pascal
VB: Dim i as integer
Pascal: var i : integer;
VB: i = 10
Pascal: i := 10;
VB: ‘comment
Pascal: {Comment}/(*Comment*)

16. Comparing VB with Pascal
Dim j as integer
j = 10
If j = 10 then
print “J = 10”
Else
print “J <> 10”
End If

17. Comparing VB with Pascal
Uses wincrt;
var j : integer;
begin
j := 10;
if j = 10 then
writeln(‘J = 10’)
else
writeln(‘J <> 10’);
End.

18. IF…THEN…ELSE program Test; var j : integer; begin j := 10;
if j = 10 then
writeln(‘J = 10’) {*** No “;”}
else
writeln(‘J <> 10’);
writeln(‘End of program’);
end;

19. IF…THEN…ELSE program Test; var j : integer; begin j := 10;
if j = 10 then
writeln(‘J = 10’)
else
writeln(‘J <> 10’);
writeln(‘End of program’);
end;
The whole If-Phrase

20. Complicated IF…THEN…ELSE
if i = 10 then
if j = 10 then
writeln(‘i = 10 and j = 10’)
else
writeln(‘i = 10 and j <> 10’)
writeln(‘i <> 10 and j <> 10’);
Correct Program

21. Complicated IF…THEN…ELSE
if i = 10 then
if j = 10 then
writeln(‘i = 10 and j = 10’)
else
writeln(‘i = 10 and j <> 10’);
writeln(‘i <> 10 and j <> 10’);
Wrong semicolon (Syntax Error)

22. Comment
begin
{This is a comment}
(* This is also a comment*)
end.