Arithmatic operations, factorial of a number, while loop, prime number, etc

 

 

 

EX.NO:4.aARITHMETIC OPERATIONS USING CASE

Aim:

To write a shell program to perform the arithmetic operations using case

Algorithm :

 

Step 1 : Read the input variables and assign the value

Step 2 : Print the various arithmetic operations which we are going to perform

Step 3 : Using the case operator assign the various functions for the arithmetic

operators.

Step 4 : Check the values for all the corresponding operations.

Step 5 : Print the result and stop the execution.

.

Program code:

 

echo 1.Addition

echo 2.Subraction

echo 3.Multiplication

echo 4.Division

echo Enter your choice

read a

echo Enter the value of b

read b

echo Enter the value of c

read c

echo b is $b c is $c

case $a in

1)d=`expr $b + $c`

echo the sum is $d

;;

2)d=`expr $b - $c`

echo the difference is $d

;;

3)d=`expr $b \* $c`

echo the product is $d

;;

4)d=`expr $b / $c`

echo the quotient is $d

;;

esac

 

Sample I/P :

1.Addition

2.Subraction

3.Multiplication

Division

Enter your choice:1

Enter the value of b:3

Enter the value of c:4

b is 3 c is 4

the sum is 7

Sample O/P:

b is 3 c is 4

the sum is 7

 

 

RESULT:Thus the program was executed and verified successfully

 

VIVA-VOCE QUESTIONS:

1. What is case statement in Linux?

2. What does esac do in Linux?

 

 

 

 

EX.NO:4.bARITHMETIC OPERATIONS USING CASE

Aim:

To write a shell program to list of file, list of process ,list of user login using case.

 

Algorithm :

Step 1 : Read the input variables and assign the value

Step 2 : Print the various list of file ,process and user log in which we are going to perform

Step 3 :Using the case operator assign the various  linux command for list of file,process and user login.

Step 4 : Print the result and stop the execution.

 

Program Code:   

clear

echo 1. list of file

echo 2. list of process

echo 3. list of user login

readval

case $val in

1)ls

echo " list of files are"

;;

2)ps

echo "list of process are"

;;

3)who

echo " list of users are"

;;

esac

 

Sample O/P:

1. list of file

2. list of process

3. list of user login

Result :

Thus the shell program to perform arithmetic operations using case is executed and output is verified successfully

 

VIVA-VOCE QUESTIONS:

1. What is case statement in Linux?

2. What does esac do in Linux?

 

 

 

 

 

 

 

 

EX.NO:4.cFACTORIAL OF A NUMBER

Aim:

To write a shell program to find the factorial of a number.

Algorithm:

step 1. Start
step 2. Read the number x
step 3. [Initialize]
        i=1, fact=1
step 4. Repeat step 4 through 6 until i=x
step 5. fact=fact*i
step 6. i=i+1
step 7. Print fact
step 8. Stop

 

Program Code:   

            clear

echo " enter any no"

read x

f=1

for((i=1;i<=x;i++))

do

f=`expr $f  \* $i`

done

echo "factorial of $x is $f"

 

Sample O/P:

 

Enter any no

5

factorial of $x is 120

 

 

 

RESULT:Thus the program was executed and verified successfully

 

VIVA-VOCE QUESTIONS:

1. What is a factorial and what is its purpose?

2. What is the use of “expr” in Linux?.

3. What are the symbols for multiplication with expr in shell script?

 

 

 

 

 

 

 

 

 

 

EX.NO:4.d USING WHILE LOOP AND UNTIL LOOP

Aim:

To write a shell program to print from 1 to 10 using while loop and then using until loop.

Algorithm :

 

step 1. Start
step 2. [Initialize] The variable i  is initialized with value 0 and then it has been tested for the condition.
step3: If the condition returns true then the statements inside the body of while loop are executed else control comes out of the loop.
step4.: value of count is incremented using ++ operator then it has been tested again for the loop condition.

Step5: Print i

Step6:Stop

 

Using while loop:                                            

Program Code:   

clear

i=0

while [ $i -le 10 ]

do

i=`expr $i + 1`

echo "$i"

done

Sample O/P:

 

1

2

3

4

5

6

7

8

9

10

Using until loop:

Program Code:   

clear

val=1

until [ $val -gt 10 ]

do

echo $val

let val=val+1

done

esc

done

Sample O/P:

1

2

3

4

5

6

7

8

9

           10

 

RESULT:

Thus the program was executed and verified successfully


VIVA-VOCE QUESTIONS:

1. What is loop?

2. What are different types of loop?

3. What is entry control loop?

4. Write syntax of while-loop.

5. What is event control loop

 

EX.NO:4.ePRIME NUMBER

Aim:

To write a shell program whether a number prime or not.

Algorithm :

 

   Step 1:START

   Step 2:Take integer variable A

   Step 3 :Divide the variable A with (A-1 to 2)

   Step 4:  If A is divisible by any value (A-1 to 2) it is not prime

   Step 5 :Else it is prime

   Step 5 : STOP

 

Program Code:   

clear

echo " Enter the no"

read a

c=0

for((i=2;i<a;i++))

do

let n=a%i

if [ $n -eq 0 ]

then

c=1

fi

done

if [ $c -eq 1 ]

then

echo "not a prime"

else

echo " prime"

fi

 

Sample I/P :

Enter the no: 53

 

Sample O/P:

prime

Result :

Thus the shell program to find the Prime number is executed and output is verified successfully.

 

VIVA-VOCE QUESTIONS:

1. What is prime number?

2. Write syntax of for-loop.

3. Can Prime Numbers be Negative?

4. What is “–eq”  in shell script?

 

 

 

EX.NO:4.fFIBONACCI SERIES

Aim:

To write a shell progrm to generate Fibonacci series.

Algorithm :

Step 1 :Initialise a to 0 and b to 1.

Step 2 : Print the values of 'a' and 'b'.

Step 3 : Add the values of 'a' and 'b'. Store the added value in variable 'c'.

Step 4 : Print the value of 'c'.

Step 5 :Initialise 'a' to 'b' and 'b' to 'c'.

Step 6 : Repeat the steps 3,4,5 till the value of 'a' is less than 10.

Program code:

echo enter the number

read n

a=-1

b=1

i=0

while [ $i –le $n ]

do

t=`expr $a + $b`

echo $t

a=$b

b=$t

i=`expr $i + 1

done

Sample I/P :

Enter the no: 5

Sample O/P:

0

1

1

2

3

5

Result :

Thus the shell program to find the Fibonacci series is executed and output is verified successfully.

 

 

VIVA-VOCE QUESTIONS:

 

1. What is Fibonacci series?

2. Why is Fibonacci important??

3. What are the real life applications of Fibonacci series?

4.What is "-le" in shell script?

 

 

 

 

 

EX.NO:4.gARMSTRONG NUMBER

Aim:

To write a shell program whether a check Armstrong number.

Algorithm :

Step 1:  Start

Step 2:  read number

Step 3:  set sum=0 and duplicate=number

Step 4:  reminder=number%10

Step 5:  sum=sum+(reminder*reminder*reminder)

Step 6:  number=number/10

Step 7:  repeat steps 4 to 6 until number > 0

Step 8:  if sum = duplicate

Step 9:  display number is Armstrong

Step 10:                  else 

Step 11:                  display number is not armstrong

Step 12:                  stop

Step 13:                   

Program Code:

echo “Enter a number: “ 

read a

x=$a

sum=0

r=0

n=0

While[ $x –gt 0 ]

do

r=`expr $x % 10`

n= `expr $r \* $r \* $r`

sum= `expr $sum + $n`

x=`expr $x / 10`

done

if[ $sum –eq    $a ]

then

echo “It ia an Armstrong No”

else

echo “It ia not an Armstrong No”

fi

Sample O/P:

Enter a number:

153

It ia an Armstrong No

 

 


Result :

Thus the shell program to find the Armstrong No is executed and output is verified successfully

 

VIVA-VOCE QUESTIONS:

1. What is meant by Armstrong number?

2. Is 5 an Armstrong number?

3. Is 0 an Armstrong number?

4. Write syntax of while-loop.

5. Write syntax of if function.

EX.NO:4.hNATURAL NUMBER

Comments

Post a Comment

Popular posts from this blog

1.Import and Export(How to read csv file using manualvfunction)

#!/usr/bin/env python # coding: utf-8 # In[5]: # Week1: Write a python program to import and export data from/to CSV file ######################################################################### ## (1) How to Read CSV File using Manual Function import pandas as pd def load_csv ( filepath ):     data = []     col = []     checkcol = False     with open (filepath) as f:         for val in f.readlines():             val = val.strip()             val = val.split( ',' )             if checkcol is False :                 col = val                 checkcol = True             else :                 data.append(val)     df = pd.DataFrame( data = data, columns = col)   ...
Read more

K Means_Clustering

  #!/usr/bin/env python # coding: utf-8 # In[3]: import pandas as pd import numpy as np import matplotlib.pyplot as plt df = pd.read_csv( r "C: \U sers \91 887 \O neDrive\Desktop \M achine_Learning\week4_Mall_Customers.csv" ) x = df.iloc[:, [ 3 , 4 ]].values # In[4]: from sklearn.cluster import KMeans wcss_list = [] for i in range ( 1 , 11 ):     kmeans = KMeans( n_clusters = i, init = 'k-means++' , random_state = 42 )     kmeans.fit(x)     wcss_list.append(kmeans.inertia_) plt.plot( range ( 1 , 11 ), wcss_list) plt.title( 'The Elobw Method Graph' ) plt.xlabel( 'Number of clusters(k)' ) plt.ylabel( 'wcss_list' ) plt.show() # In[ ]:
Read more

How to became a junior Engineer

How to become a junior Engineer. We know that about a junior Engineer. We and all have only a question  How I Became? I want to explain you. Every Central and state Government has Organized exam for preparing junior Engineeringlike (polytechnic , Diploma cources etc) Step 1 . Junior Engineer course exam  is organized every year on the month of April,may,and June. Fill the registration appearing form . Step 2. prepare the examination for the junior engineering. Step 3. Appear the examination on the junior engineering Step 4.   If you will pass out the exam then you will appear on the counselling .this time counselling is organized on online so you will fill your choice  branch like(civile engineering,electrical engineering, mechanical engineering, computer science and engineering, mining engineering etc)and choice your college . Step 4.  After fill your choice and college you will allotted a particular branch and college if you like the branch and colle...
Read more