Program :

                      Program is a set of instructions written in programming language to perform a specified task.

 Programming:
                  The process to give instructions to the computer is called programming .

 Programmer:

                        The person who is involved to  prepare a computer program is called programmer.

 System programmers:

                                                            The person who writes program to boot the computer to control the hardware components  etc are called system programmers.

 Application programmer:

                                                                  Appication programmer are used to design a application program to fulfill a specified task.

  Programming language:

                                                                        The language which is used to write programs for the computer is called programming language.

  Machine language:
                                The first language of computer was binary language, which is also known as machine language.

                                                                                            
  Assembly language:                                       
                                 Due to the complexities of machine language in the early 1950’s IBM company with contribution of computer scientists developed another language, which is known as assembly language.

  High level language: 

                                                          In the early 1960’s different languages were developed and used in the third generation of computers which are known as High level language.

  Compiler:

                         Compiler is a language translator that translates the program written in high level language to machine language at once.

  Interpreter:

                             Interpreter is a language translator that translates the program written in high level language to machine language statement by statement.

  Assembler:

                            Assembler is a language translator, which translates an assembly language program into its equivalent machine language program.  

  Fourth generation language:                                                            Fourth generation languages are closer to human languages than typical high level programming language.

  Advantages of machine language:

·                     Machine language is directly understood by the computer so the program written in machine language does not need to be converted.

·                     The program developed using machine  language becomes extremely fast since   no conversion is required.

      Disadvantage of machine language:

      

·                     Programming using machine language is difficult to write and remember.

·                     A machine language is machine dependent. Machine codes depend upon the architecture of the computer.

·                      It is time consuming and tedious task to modify the program written in machine language.

      Advantages of Assembly language:
                    

·                       As assembly language uses symbols and mnemonic codes it is easy  to understand write and modify program  in assembly language.

·                      It is easy to find out errors in the programs written in assembly language.

·                     The program written in assembly language executes faster because it is closer to the machine.

            

     Disadvantage of Assembly language:

·                     A assembly language  is also machine dependent language.The  program  written for one type of  computer has to be modified to use in another type of computer.

·                      Since assembly language is machine   dependent,the programmer must have   knowledge of hardware.

·                     The program written in assembly language is less efficient.The assembly  program takes more time to execute  than the machine codes program.

     Advantages of High level Language:

·                     As high level language are closer to English language, they are easy to  learn and use.

·                     High level language are machine independent.so,It is easy to write and  modify programs written in high  level   language.

·                     It is easy to do documentation of high level program.

·                     It is faster to write programs in the high level language.

     Disadvantage of High level language:

·                     High level programs takes more time to execute in computer.

·                      Programs written in high level language  must need language processors   to convert  into  machine  language.

god save us

Qbasic programming
1)  Wap to input any number and check whether the given number is divisible by 5 or not.

    REM

    CLS

    INPUT”Enter any number”; N

    IF N MOD 5=0 THEN

    PRINT”The given number is divisible by 5” 

    ELSE

    PRINT”The given number is not divisible by 5”

    END IF

    END

  2)  Wap to input any number and check whether the given number is divisible  by 3 and 7 or not.

   REM

   CLS

   INPUT”Enter any number”; N

   IF N MOD 3=0 AND N MOD 7=0 THEN

   PRINT”The given number is divisible by 3 and 7”

   ELSE

   PRINT”The given number is not divisible by 3 and 7”

   END IF

   END

3)   Wap to input any number and check whether the given number is positive negative or zero.

   REM

   CLS

   INPUT”Enter any number”; N

   IF N>O THEN

   PRINT”The given number is positive”

   ELSEIF N<0 THEN

   PRINT”The given number is negative”

   ELSE

   PRINT”The given number is zero”

   ENDIF

   END

4)   Wap to input any number and check whether the given number is odd or even

    REM

    CLS

    INPUT”Enter any number”; N

    IF N MOD 2=0 THEN

    PRINT”The given number is even”

   ELSE

   PRINT”The given number is odd”

   ENDIF

   END    

5) Input a mark in a subject of student and check if student is  pass or not.

REM

CLS

INPUT ”Enter mark of a student”;S

IF S>=40 THEN

PRINT”The student is pass”

ELSE

PRINT”The student is fail”

END IF

END

6)   Wap to input any 2 number and display the greater one.

     REM

    CLS

    INPUT”Enter first number”;A

    INPUT”Enter second number”;B

    IF A>B THEN

    PRINT A;”is greater”

    ELSE

    PRINT B;”is greater”

    END IF

    END

7)   Wap to input any 3 number and display the greatest one.

   REM

    CLS

    INPUT”Enter first number”;A

    INPUT”Enter second number”;B

    INPUT”Enter third number”;C

    IF A>B AND A>C THEN

    PRINT A;”is greatest”

    ELSEIF B>A AND B>C THEN

    PRINT B;”is greatest”

    ELSE

    PRINT C;”is greatest”

    END IF

    END

  8) Wap to display all natural numbers from 1 to 100.

  DO WHILE….LOOP                                                DO….LOOP WHILE 

REM                                                                REM

CLS                                                                  CLS

I = 1                                                                  I= 1

DO WHILE I < = 100                                        DO

PRINT I,                                                           PRINT I,

I = I+1                                                               I = I +1

LOOP                                                                LOOP WHILE I < =100

 END                                                                  END

DO UNTIL….LOOP                                               DO….LOOP UNTIL

REM                                                                   REM

CLS                                                                     CLS

I = 1                                                                                        

DO UNTIL 1 > 100                                              DO

PRINT I,                                                               PRINT I,

I = I+1                                                                   I= I+1

LOOP                                                                   LOOP UNTIL I >100

END                                                                      END

FOR….NEXT                                                         WHILE….WEND

REM                                                               REM

CLS                                                                 CLS

FOR A = 1 TO 100                                          I = 1

PRINT A,                                                        WHILE I < =100

NEXT A                                                         PRINT I,

END                                                                  I = I +1

                                                                         WEND

                                                                          END

9)   Wap to display 10, 20, 30….100.

DO WHILE….LOOP                              DO….LOOP WHILE

REM                                                                         REM

CLS                                                                          CLS

I = 10                                                                        I = 10

DO WHILE I < = 100                                             DO

PRINT I,                                                                  PRINT I,

I = I+10                                                                    I = I +10

LOOP                                                                     LOOP WHILE I < =100

 END                                                                     END

DO UNTIL….LOOP                        DO….LOOP UNTIL

REM                                                               REM

CLS                                                                CLS

I = 10                                                             I = 10

DO UNTIL 1 > 100                                     DO

PRINT I,                                                       PRINT I,

I = I+10                                                        I= I+10

LOOP                                                           LOOP UNTIL I >100

END                                                             END

FOR….NEXT                           WHILE….WEND

REM                                                            REM

CLS                                                             CLS

FOR A = 10 TO 100 STEP 1O                    I = 10

PRINT A,                                                    WHILE I < =100

NEXT A                                                      PRINT I,

END                                                            I = I +10

                                                                    WEND

                                                                    END

 10) Wap to display all even numbers from 50 to 1

DO WHILE….LOOP                               DO….LOOP WHILE

REM                                                                               REM

CLS                                                                                CLS

I = 50                                                                              I = 50

DO WHILE I < = 50                                                       DO

PRINT I,                                                                          PRINT I,

I = I - 2                                                                            I = I - 2

LOOP                                                                             LOOP WHILE I < =1

 END                                                                                END

DO UNTIL….LOOP                               DO….LOOP UNTIL

REM                                                                                REM

CLS                                                                                 CLS

I = 50                                                                                I = 50

DO UNTIL I < 1                                                               DO

PRINT I,                                                                          PRINT I,

I = I - 2                                                                             I= I - 2

LOOP                                                                              LOOP UNTIL I <1

END                                                                                 END

FOR….NEXT                                            WHILE….WEND

REM                                                                                         REM

CLS                                                                                          CLS

FOR A= 50 To 1 step-2                                                           I = 50

PRINT A,                                                                                 WHILE I <=1

NEXT A                                                                                    PRINT I,

END                                                                                          I = I - 2

                                                                                                  WEND

                                                                                                  END