QBasic is an introduction to basic programming concepts using a simple programming language. It discusses that computers require a language to communicate, dividing languages into low-level and high-level forms. QBasic is presented as a popular version of the high-level BASIC language, suitable for beginners to learn simple commands like PRINT, INPUT, and END. Examples are provided to demonstrate printing text, taking user input, and creating a basic program to print a greeting.

1. Introduction to Qbasic
By Richa Kathuria

2. Computer Language

As we need a language to communicate with each
other, similarly we need a language to communicate
with computer.

There are two types of languages for computer:
1. Low Level Languages : in form of 0s and 1s.
2. High Level Languages : they are like English, that
we can understand easily.

3. Qbasic

Basic is the first high level language.

Very simple to learn and understand.

Qbasic is Quick Basic , its a popular version of
Basic.

For windows 7 we need at least Qbasic 32 bits.

We use “commands” to give instructions to the
computer in a computer language.

4. Simple commands

PRINT- to display any text to the output screen
Eg PRINT”Hello”
Output : Hello

INPUT- this is used to take any value from the user.
Eg If you want to print user's name on the screen ,
then take input from user.
INPUT name$

END- this is to end the program, program will not
run the commands after that.

5. The first Glance: Qbasic window

6. First Program and Output

7. Explanation
Program to Print Hello
Print “Hello”
END

Press F5 to run the program and see the output.

Here Print command will direct the text “Hello” to the
output screen.

END will end the program.

Output will only be Hello , commands are not shown there.

8. Input Command Example

9. Explaination

Program to print name of user
PRINT "Hello"
PRINT "Enter your name"
INPUT name$
PRINT "Your name is "; name$
END

Here name$ is a variable to store value of name.

Input command is used to take value from the user.

When we print value of a variable , no double quotes are
used.

10. Thank You