PROGRAMMING PASCAL
LESSON 2
Now we will focus on operations and strings
We will learn also IF statement
Let's start
We will make a calculator using Pascal
IF statement looks like this
if -condition- then
begin
operations...
end;
But if there is many conditions
it will look like this
if -condition- then
begin
operations...
end
else if -condition2- then
begin
operations...
end
.
.
.
else -other conditions- then
begin
operations...
end;
*** CALCULATOR ***
program calc;
uses wincrt;
var x,y,res:integer;
sel:char;
BEGIN
writeln('1. Addition');
writeln('2. Substraction');
writeln('3. Multiplication');
writeln(' Select: ');Readln(sel);
write('Enter an integer a=');readln(a);
write('Enter an integer b=');readln(b);
if sel='1' then res=a+b
else if sel='2' then res=a-b
else if sel='3' then res=a*b
else write('Invalid number.');
end.
Pascal
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