1. Conditional statements (2)
IF mark>=50 THEN
writeln(‘pass’)
ELSE
writeln(‘work hard’);

2. ????? Consider the following flowchart: Get mark N Y mark>=50?
Display
‘pass’
Display
‘fail’
Display
‘Bye Bye’
END

3. Get mark N Y
mark>=50?
Display
‘pass’
Display
‘fail’
Display
‘Bye Bye’
END

4. readln(mark) writleln(‘fail’) writeln(‘pass’) writeln(‘Bye Bye’);
END

5. write(‘Please enter your mark:’);
readln(mark);
if (name >= 50) then
writeln(‘pass’)
else
writeln(‘fail’);
writeln(‘Bye Bye!’);

6. program pass;
var mark:integer;
begin
write(‘Please enter your mark:’);
readln(mark);
if (name >= 50) then
writeln(‘pass’)
else
writeln(‘fail’);
writeln(‘Bye Bye!’);
end.

7. (Alternative) program pass; var mark:integer; begin
write(‘Please enter your mark:’);
readln(mark);
if (name >= 50) then
writeln(‘pass’);
if (name <50) then
writeln(‘fail’);
writeln(‘Bye Bye!’);
end.

8. Syntax Example if <<Boolean expression>> then
<<statement>>
else
<<statement>>;
Example
if (sex=‘F’) or (sex=‘M’) then
number:=number + 1
else
writeln(‘invalid input’);

9. Exercise 1 Please enter a number:19 It is not divisible by 4.
Write a program to get a number from the user and tell the user whether it is divisible by 4. Make use of if…then…else statement.
Sample output:
Please enter a number:19
It is not divisible by 4.
Please enter a number:36
It is divisible by 4.

10. Answer program divisible; var number:integer; begin
write(‘Please enter a number:’);
readln(number);
if (number mod 4)=0 then
writeln(‘It is divisible by 4’)
else
writeln(‘It is not divisible by 4’);
end.

11. Exercise 2 Please enter your mark:85 Your grade is B
Write a program to get a mark from the user and display the corresponding grade according table:
=> A
81-90 => B
66-80 => C
51-65 => D
0-50 => F
Make use of if…then…else statement.
Sample output:
Please enter your mark:85
Your grade is B

12. Answer program divisible; var mark:integer; grade:char; begin
write(‘Please enter your mark:’);
readln(mark);
if (mark<=100) then
if (mark>=91) then grade:=‘A’
else if (mark>=81) then grade:=‘B’
else if (mark>=66) then grade:=‘C’
else if (mark>=51)then grade:=‘D’
else if (mark>=0)then grade:=‘F’;
writeln(‘Your grade is ‘,grade);
end.