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: The command which display text
and numbers in the screen.
: Helps to make clear the screen after
a command is executed.
: It helps to add text or remark for
the user that will not be executed.
: It stops the execution of the
program.

UJJAL SHARMA

The comma causes the output to be displayed after
leaving a gap of approximately 8-10 characters.
Syntax: PRINT “text”, “text”

It will execute the following.

UJJAL SHARMA

T h e s e mi c o l o n c a u s e s
t h e o u t p u t t o b e
d i s p l a y e d a f t e r
l e a v i n g n o s p a c e .
Sy n t a x : PRI N T “t e x t ”;
“t e x t ”

Ex e c u t i o n wi l l
UJJAL SHARMA b e t h e

Th e Co l o n a l l o ws t o
wr i t e mo r e t h a n o n e
s t a t e me n t o n a s i n g l e
l i n e .
Sy n t a x : PRI NT “t e x t ”:
Pr i n t “t e x t ”

I t wi l l Pr i n t
UJJAL SHARMA t h e

We will know about the basic rules to use
Variables.

 A variable can be big or small, it may contain
letter or numbers but the first letter should
be a letter.
 A variable cannot contain spaces.
 A special character is allowed in QBASIC
which is underscore.

UJJAL SHARMA

• We will know about three types of
operators:

UJJAL SHARMA

Operation Arithmetic Example Output
a = 20
Symbol b = 10
Addition + PRINT a + b 30

Subtraction - PRINT a - b 10

Multiplication * PRINT a * b 200

Division / PRINT a/b 2

Parenthesis () PRIN a + (b*2) 40

Raising to a power PRINT a ᶺ2 400
ᶺ
UJJAL SHARMA

Operation Relational Example Output (Will
a = 20
Symbols b = 10 result in TRUE
or FALSE)

Greater than > a>b TRUE

Greater than or equal to >= a>=b TRUE

Less than < a<b FALSE

Less than or equal to <= a<=b FALSE

Equal to = a=b FALSE

Not equal to <> a<>b TRUE
UJJAL SHARMA

Operation Relational Example Output (Will
a = 20
Symbols b = 10 result in TRUE
c = 50 or FALSE)
AND (All the AND a>b and a>c False
conditions must be Here, cond1 (a>b) is
true for the final true but cond2 (a>c)
result to be true) is false. So the final
result is false.

OR (Any one or all OR a>b and a>c True
the conditions Here, since one
should be true for condition i.e. cond1
the final result to be (a>b) is true, so the
true) final result is true.

UJJAL SHARMA

• We will know about 3 statements:

UJJAL SHARMA

• When a value of a variable is required to be
accepted during the execution of the program,
then the INPUT command is used.
• Syntax: INPUT Variable name
Example

The output is in next slide.
UJJAL SHARMA

• At first

• Next

• And then

UJJAL SHARMA

• GOTO command is used to shift the control of the
program to the desired command. To specify where the
control of the program should go, label name is
specified along with the GOTO command.
• Example,

The label name is
always followed by
a colon
Output will be

UJJAL SHARMA

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Computer (Q BASIC)

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