This is a continuation from: Understanding Basic Language
Mathematical
Operators
To
carry out arithmetic operations in programming language, mathematical operators
are used. Some of these operators are given below:
Operations Operator
Addition +
Subtraction -
Multiplication x
Division /
Greater
than >
Lesser
than <
Exponential ^
Non
equal <>
Expressions
An
expression is something the interpreter calculates (or evaluates).
Some
examples given below:
A
= 24
B
= 25
C
= A + B (returns 49)
A
= 120
B
= 12
C
= A / B (returns 10)
A
= 34
B
= 26
C
= A - B (returns 8)
A
= 200
B
= 100
C
= (A * 3) + B (returns 700)
A
= 3
B
= 2
C
= A ^ B (returns 9)
Evaluate
the following:
100
+ 50/2 =
100
+ 5 – 90 =
82
– (3 x 20 + 4) =
32
– 23 =
40
/ 21 + (20 – 2) =
When
the Basic Interpreter is loaded into the memory of the computer, the Basic
Interface screen will open.
Type your first
program:
10
PRINT “Welcome to the World of BASIC”
Press F2 to run
the program. You will see the output as follows:
Press
any key to return to the main screen.
Some
Important Commands- A command tells the Basic Interpreter to
perform a certain task.
PRINT: The
PRINT command tells the Interpreter to print something on the screen. In the
above case the interpreter prints – “Welcome to the World of Basic”.
Try
the following examples
PRINT
5 + 10 * 2
25
PRINT
“ROSE & LOTUS”
ROSE
& LOTUS
PRINT
“COMPUTER”
COMPUTER
PRINT
3 ^ 2 * 5
45
PRINT
“SACHIN”
SACHIN
PRINT
“Rahul” ; “Dravid”
RahulDravid
PRINT
“Rahul” , “Dravid”
Rahul Dravid
If
a List of Instructions has to be
given, line numbers will have to be used.
Try the
following examples:
10 PRINT 100
20 END
RUN
100
OK
10 PRINT 15
20 PRINT 15 + 15
30 END
RUN
15
30
OK
10
PRINT “THE LOST”
20
PRINT “WORLD”
30
END
RUN
THE
LOST
WORLD
OK
10
PRINT “ROHIT”
20
END
30
PRINT “RAM”
RUN
ROHIT
OK
END: The
last statement of a program is END. END terminates the program. It means that
the program is complete and the computer will ignore any line number given
after the END statement.
POINTS
TO REMEMBER
- PRINT
statement displays anything written after it. It may be data or result.
- END statement
is used to terminate the program.
- Once program
is over, RUN command is given to execute the program.
- When a
Computer has to do more than one calculation then it follows BODMAS Rule.
B
à
Brackets
O
à Of
D
à
Division
M
à
Multiplication
A
à
Addition
S
à
Subtraction
State “True” or “False”
1) PRINT command
cannot be given with line numbers.
2) For division
we use “ / “ sign.
3) Non-Numeric
data is displayed as it is.
4) The computer
will ignore any line number given after END statement.
5) Non-Numeric
information is written in double quotation marks.
