Qbasic Tutorial for beginners and children (Under Construction)


QBasic Tutorial: Chapter 3

The PRINT statement - Writing data to the screen

The print statement is used to write data on the screen.

You can write:

  • Numbers
  • Characters, Sentences, Texts
  • The contents of memory variables and constants

Note: Characters and sentences are written within inverted commas(" "). What is written within inverted commas is displayed as is during run time.

The following examples illustrate the different ways to use the PRINT statement:

Code Screen Output Comment
PRINT "5" 5 Writing character 5 to the screen.

 

PRINT 5  5 Writing number 5 to the screen.

 

PRINT 5
PRINT "5"
 5
5

 

Note the space before the number 5 in the first line. BASIC always puts a space for +/- signs when printing a number.
PRINT "5 + 7" 5 + 7

 

What is within inverted commas is written as is.
PRINT 5 + 7  12

 

Writing the sum of 5 and 7 to the screen
PRINT 6 * 7  42

 

The * sign is used for multiplication.
PRINT 12 / 4  3

 

The / sign is used for division.
PRINT 8 - 3  5

 

 
a = 3
b = 4
c = a + b
d = a * b
PRINT a
PRINT b
PRINT c
PRINT d

 

 3
 4
 7
 12
a, b, c and d are memory variables. 
The value 3 is assigned to memory variable a.
The value 4 is assigned to memory variable b.
In the 3rd line, the computer looks assigns the sum of memory variables a and b to memory variable c.
In the 4th line the computer looks assigns the product of memory variables a and b to memory variable d.
In line 5, the computer looks for the value of memory variable a and writes it to the screen.
a = 3
PRINT "a"

 

a Did you expect to get 3 on the screen? Don't forget that whatever is within inverted commas is written as is.

The correct code should be:

a = 3
PRINT a

We will see more features of the PRINT statement later.

[ Previous Index Next ]


pages viewed since January  19 2002