SHELL PROGRAMMING add two no, three no, etc

SHELLPROGRAMMING

EX.NO:2.a PRINT STRING

Aim:

To write a shell Program to print Haldia.

Algorithm:

Step1: Start

Step2: Print the string using echo command on screen and stop the execution..

Programcode:

echo 'Haldia'

Sample O/P:

Haldia

Result:

Thus the shell program to define variable x with value 10 and print it on screen is executed and output is verified successfully.

EX.NO:2. bPRINT INITIALIZE VALUE

Aim:

To write a shell Program to define variable x with value 15 and print it on screen.

Algorithm:

Step1: Define the variable x=15.

Step2: Print the value of x on screen and stop the execution.

Programcode:

n=15

echo The value of n is $n

Sample O/P:

The value of n is 15

Result:

Thus the shell program to define variable x with value 15 and print it on screen is executed and output is verified successfully.

VIVA-VOCE QUESTIONS:

1. What is the purpose of ECHO command?

2. What is the use of man command in Linux?.

3. What is Shell Script?

EX. N0: 2.c PRINT SUM OF TWO NUMBERS

Aim:

ToWrite a shell Program to Print sum of two numbers.

Algorithm:

Step1: Define x=20 and y=10.

Step2:Calculate the sum of two variables and store the value in variable z using arithmetic operations .

Step 5 : Print the value of variable z and stop the execution.

Programcode:

x =20

y =10

z= `expr$x + $y`

echo $z

Sample O/P:

Result:

Thus the shell program to Print sum of two numbers is executed and output is verified successfully.

Ex. NO: 2.dPRINT SUM OF TWO NUMBERS USING EXPR COMMAND

Aim:

ToWrite a shell Program to Print sum of two numbers.

Algorithm:

Step1: Start

Step2: Calculate the sum of twovalues usingexpr command .

Step 5 : Print the result and stop the execution.

Programcode:

expr 3 + 5

Sample O/P:

Result:

Thus the shell program toPrint sum of two numbers is executed and output is verified successfully.

VIVA-VOCE QUESTIONS:

1. What is the purpose of “expr” command?

2. What is the use of man command in Linux?.

3. What is the purpose of “echo” command?

EX.NO:2.ePRINT MULTIPLICATION OF TWO NUMBERS USING EXPR COMMAND

Aim:

ToWrite a shell Program to Print s multiplication of two numbers.

Algorithm:

Step1: Start

Step2:Calculate the sum of two values using expr command .

Step 5 : Print the result and stop the execution.

Programcode:

expr 3 \* 2

Sample O/P:

Result:

Thus the shell program to Print sum of two multiplication is executed and output is verified successfully.

EX.NO:2.fADDITION OF TWO NUMBERS USING LET COMMAND

Aim:

ToWrite a shell Program to Print sum of two numbers.

Algorithm:

Step1: Start

Step2:Calculate the sum of two values using let command and stored the value in x.

Step 5 : Print the value of x and stop the execution.

Program Code:

let x=15+10

echo $x

Sample O/P:

Result:

Thus the shell program to to Print sum of two numbers is executed and output is verified successfully.

VIVA-VOCE QUESTIONS:

1. What is the purpose of “expr” command?

2. What is the use of man command in Linux?.

3. What is the purpose of “echo” command?

EX.NO:2.gADDITION OF THREE NUMBERS

Aim:

ToWrite a shell Program to Print sum of three numbers.

Algorithm:

Step1: Start

Step2:Calculate the sum of three values and stored the value in z.

Step 5 : Print the value of z and stop the execution.

Programcode:

x=22 y=28 z=5

((z=x+y+z))

echo $z

Sample O/P:

Result:

Thus the shell program to Print sum of two numbers is executed and output is verified successfully.

VIVA-VOCE QUESTIONS:

1. What is the purpose of “bc” command?

2. How to use pipe to assign a variable?

3. What is the purpose of “echo” command?

4.. What is the use of man command in Linux?.

EX.NO:2.hPRINT SUM OF TWO NUMBERS USING “bc”COMMAND

Aim:

How to use decimal numbers in shell script.

Algorithm:

Step1: Define a and b.

Step2: Calculate the sum of two variables using bc command and store the value in variable c.

Step 5 : Print the value of variable c .

Step: Stop

Programcode:

a=81.3

b=15.7

c=`echo $a + $b | bc`

echo $c

Sample O/P:

c=97

Result:

Thus the shell program is executed and output is verified successfully

VIVA-VOCE QUESTIONS:

1. What is the purpose of “bc” command?

2. How to use pipe to assign a variable?

3. What is the purpose of “echo” command?

EX.NO:2.iPRINT DEFINE BUILT-IN SHELL VARIABLES

Aim:

To write a shell Program to define Built-in shell variables.

Algorithm:

Step1: Start.

Step2: Represent the total no of arguments.

Step3: Represent all arguments.

Step4: Represent arguments 1 through 3.

Step5: Represent the command or script.

Step6: Print the result and stop the execution..

Programcode:

echo "The number of parameters are $#"

echo "The parameters are $*"

echo "The parameters are $1 $2 $3"

echo "The shell scripts command is $0"

Sample O/P:

The number of parameters are 3

The parameters are hello world earth

The shell scripts command is ./file.sh

Result:

Thus the shell program is executed and output is verified successfully.

VIVA-VOCE QUESTIONS:

1. What is $# in Shell?

2. What does $* mean?

3. What is $0 in Shell?

EX.NO:2.j PRINT YOUR NAME

Aim:

To Write a shell Program to Print your name. Name should be taken at runtime from keyword.

Algorithm:

Step1: Print Enter your 1^st name and last name.

Step2: Name should be taken at runtime from keyword.

Step3: Print the name on screen and stop the execution..

Programcode:

echo -n "Enter your first name "

read f

echo -n "Enter your last name "

read l

echo "Your name is $f $l"

Sample I/P:

Enter your first name

Rinku

Enter your last name

Bhunia

Sample O/P:

Your name is Rinku Bhunia

Result:

Thus the shell program to Print your name is executed and output is verified successfully.

VIVA-VOCE QUESTIONS:

1. What is the purpose of “bc” command?

2. what is “read “ command?

3. What is the purpose of “echo -n” command?

EX.NO:2.k SHOW DATE

Aim:

To write a shell Program to show your date on screen.

Algorithm:

Step1: Start

Step2: The output of date can be formatted with a sequence of format control characters preceded by a +sign.The format controls start with the % symbol and are substituted by their values. The %y character will be replaced with the year,%m with month and %d with the day of the month. store the value in variable m.

Step3:display the output of m.

Step4: Stop

Program code:

m=`date +%d/%m/%y`

echo "Current system date is $m"

Program code:

echo $(date “+%d-%m-%y”)

Sample O/P:

Current system date is 16/05/1990

Sample O/P:

16-05-1990

Result:

Thus the shell program to Print the current date is executed and output is verified successful

VIVA-VOCE QUESTIONS:

1. What is the purpose of “date” command?

2. What is the command to change date in Linux?

3. What is the purpose of “echo” command?

EX.NO:2.l FOR LOOP THROUGH A LIST

Aim:

How to write a BASH ‘for’ loop through a List.

Algorithm:

Step1: Start

Step2:In a BASH, “for” loop all, the statements between do and done are performed once every item in the list. Each time the loop iterates, the next value in the list is inserted into the variable specified after the word for. In the below loop, the variable is called x.

Step3: The echo statement displays information to the screen.Therefore; this example takes the numbers 1 through 5 and outputs them one by one to the screen.

Step4:Stop

Program code:

for x in 1 2 3 4 5

echo "The value of x $x"

done

Sample O/P:

The value of x 1 2 3 4 5

Result:

Thus the shell program is executed and output is verified successful

VIVA-VOCE QUESTIONS:

1. What is the syntax of “for” loop?

2. What is the syntax of do ,done and in?

3. What is the purpose of “echo ” command?

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