1

List of Shell Programs

S.No List of Programs

1 Shell Program to Swap Two Numbers

2 Shell Program to Add Two Numbers

3 Shell Program to Find the Biggest of Two Numbers

4 Shell program to Find the Biggest of Three Numbers

5 Shell Program to Find the Area and Circumference of a Circle

6 Shell Program to Find the whether the given Number is Positive,

Negative and Zero

7 Shell Program to Find the whether the given Number is Even or

Odd

8 Shell Program to Find the whether the given Year is Leap Year or

Not

9 Shell Program to Convert Fahrenheit to Celsius and Celsius to Fahrenheit

10 Shell Program to Find the Quotient and Remainder of two Numbers

11 Shell Program to check whether a number is divisible by 5

12 Shell Program to find the sum and average of four integers

13 Shell Program to compute simple interest and compound interest

14 Shell Program to calculate the sum of digits(without using loop)

15 Shell Program to Print the first “N” Odd Number

16 Shell Program to Print the first “N” Even Number

17 Shell Program to Find the Factorial of a given Number

18 Shell Program to Find the Factorial of a given “N” Number

19 Shell Program to find the GCD of numbers

20 Shell Program to Compute Power of X

21 Shell Program to Find whether the given Number is Prime or Not

22 Shell Program to Find the First “N” Prime Number

23 Shell Program to Find whether the given Number is Armstrong Number or Not

24 Shell Program to reverse the digits of a number

25 Shell Program to find the sum of the digits of a given number

26 Shell Program to execute various UNIX commands using Case

Statements

2

27 Shell Program to count the number of vowels in a line of text

28 Shell Program to find the sum of odd digits and even digits from a number

29 Shell Program to find the smallest and largest number from a set

of number

30 Shell Program to check the given number and its reverse are

same

31 Shell Program to generate Fibonacci Series

32 Shell Program to find the sum of square of Individual Digits

33 Shell Program to find the sum of cube of Individual digits of a

given Numbers

34 Shell Program to find the Smallest and Largest digits of a

numbers

35 Shell Program to compute Gross Salary of an Employee

36 Shell Program to find the degree of x in a Quadratic Equation

37 Shell Program to display the digits which are in Odd Position in a given Number

38 Shell Program to check the given string is palindrome or not

3

1. Write a Shell Program to Swap Two Numbers

ccetstudent@EMCA:~$ cat>swap.sh

echo "Enter value for X:" read x

echo "Enter value for Y:" read y

echo "Before swap, x=$x and y=$y" z=$x

x=$y y=$z

echo "After swap, x=$x and y=$y"

ccetstudent@EMCA:~$ sh swap.sh

Enter value for X: 10

Enter value for Y: 20

Before swap, x=10 and y=20 After swap, x=20 and y=10

ccetstudent@EMCA:~$

2. Write a Shell Program for Addition of Two Numbers echo "Addition of Two numbers" echo "Enter two numbers"

read a read b

c=`expr $a + $b ` echo "$c"

Output

ccetstudent@EMCA:~$ sh add.sh

Addition of Two numbers

Enter two numbers 3

4 7

4

3. Write a Shell Program to find the Biggest of Two Numbers #compare two numbers

echo "Enter the two numbers" read a

read b

if test $a -gt $b then

echo "a is big" else

echo "b is big" fi

4. Write a Shell program to find the Biggest of Three Numbers #compare three numbers echo "Enter the three numbers"

read a

read b read c

if test $a -gt $b -a $a -gt $c then

echo "a is big" elif test $b -gt $c

then echo "b is big"

else echo "c is big"

fi

5

5. Write a Shell Program to Find the Area & Circumference of a Circle ccetstudent@EMCA:~$ cat>area.sh

#Area and Circumference of a Circle echo "Enter the Radius"

read radius arear=`echo 3.14 \* $radius \* $radius |bc`

circu=`echo 2\* 3.14 \* $radius |bc` echo "Area of the Circle="$arear

echo "Circumference of the Circle="$circu

ccetstudent@EMCA:~$ sh area.sh Enter the Radius

10

Area of the Circle=314.00 Circumference of the Circle=62.80

ccetstudent@EMCA:~$

6. Write a Shell Program to Find the whether the given Number is Positive, Negative & Zero

ccetstudent@EMCA:~$ cat>check.sh echo "Enter the Number"

read x if test $x -gt 0

then echo "The given Number is Positive="$x

elif test $x -eq 0

then echo "The given Number is Zero="$x

else echo "The given Number is Negative="$x

fi

ccetstudent@EMCA:~$ sh check.sh Enter the Number

10 The given Number is Positive=10

ccetstudent@EMCA:~$ sh check.sh

6

Enter the Number

-10 The given Number is Negative=-10

ccetstudent@EMCA:~$ sh check.sh Enter the Number

0 The given Number is Zero=0

7. Write a Shell Program to Find the whether the given

Number is Even or Odd ccetstudent@EMCA:~$ cat>odd.sh echo "Enter the Number to Check"

read n if test `expr $n % 2` -eq 0

then echo "The given Number is Even="$n

else echo "The given Number is Odd="$n

fi

ccetstudent@EMCA:~$ sh odd.sh

Enter the Number to Check 10

The given Number is Even=10 ccetstudent@EMCA:~$ sh odd.sh

Enter the Number to Check 33

The given Number is Odd=33

8. Write a Shell Program to Find the whether the given Year is Leap year or Not

ccetstudent@EMCA:~$ cat>leap.sh

echo "Enter the Year to Check" read leap

if test `expr $leap % 4` -eq 0

7

then

echo "The given Year is Leap="$leap else

echo "The given Year is Not Leap="$leap fi

ccetstudent@EMCA:~$ sh leap.sh

Enter the Year to Check 1994

The given Year is Not Leap=1994 ccetstudent@EMCA:~$ sh leap.sh

Enter the Year to Check 1996

The given Year is Leap=1996

9. Write a Shell Program to Convert Fahrenheit to Celsius and Celsius to Fahrenheit echo "*** Converting between the different temperature scales ***"

echo "1. Convert Celsius temperature into Fahrenheit" echo "2. Convert Fahrenheit temperatures into Celsius"

echo -n "Select your choice (1-2) : " read choice

if [ $choice -eq 1 ]

then echo -n "Enter temperature (C) : "

read tc

# formula Tf=(9/5)*Tc+32 tf=$(echo "scale=2;((9/5) * $tc) + 32" |bc)

echo "$tc C = $tf F"

elif [ $choice -eq 2 ] then

echo -n "Enter temperature (F) : " read tf

# formula Tc=(5/9)*(Tf-32) tc=$(echo "scale=2;(5/9)*($tf-32)"|bc)

echo "$tf = $tc"

8

else

echo "Please select 1 or 2 only" exit 1

fi

Output *** Converting between the different temperature scales ***

1. Convert Celsius temperature into Fahrenheit 2. Convert Fahrenheit temperatures into Celsius

Select your choice (1-2) : 1 Enter temperature (C) : 32

32 C = 89.60 F

10. Write a Shell Program to find the Quotient and Remainder of two Numbers

ccetstudent@EMCA:~$ cat>rem.sh

echo "Enter the Value of Divisor" read a

echo "Enter the Value of Divident" read b

quo=`echo $a\/$b |bc` rem=`echo $a\%$b |bc`

echo "Quotient = "$quo echo "Remainder = "$rem

ccetstudent@EMCA:~$ sh rem.sh

Enter the Value of Divisor 10

Enter the Value of Divident

3 Quotient = 3

Remainder = 1

11. Write a shell program to check whether a number is divisible by 5

ccetstudent@EMCA:~$ cat>div5.sh

echo "Enter the Number to Check" read number

9

if test `expr $number % 5` -eq 0

then echo "The give Number is Divisible by 5"

else echo "The given Number is Not Divisible by 5"

fi

ccetstudent@EMCA:~$ sh div5.sh Enter the Number to Check

4 The given Number is Not Divisible by 5

ccetstudent@EMCA:~$ sh div5.sh Enter the Number to Check

5 The give Number is Divisible by 5

12. Write a shell program to find the sum and average of four integers

echo "Enter 4 Numbers to Find Sum and Average" echo "Enter the 1st Number"

read no1 echo "Enter the 2nd Number"

read no2 echo "Enter the 3rd Number"

read no3 echo "Enter the 4th Number"

read no4

sum=`expr $no1 + $no2 + $no3 + $no4` avg=`expr $sum / 4`

echo "Sum of 4 Numbers= "$sum echo "Average of 4 Numbers= "$avg

ccetstudent@EMCA:~$ sh avg.sh

Enter 4 Numbers to Find Sum and Average Enter the 1st Number

10 Enter the 2nd Number

20 Enter the 3rd Number

1 0

30

Enter the 4th Number 40

Sum of 4 Numbers= 100 Average of 4 Numbers= 25

13. Write a shell program to compute simple interest and compound interest

echo "Enter the Principal Amount"

read p echo "Enter the Rate of Interest"

read r

echo "Enter the Number of Years" read n

si=`expr $p \* $r \* $n` si=`expr $si / 100`

echo "The Simple Interest is: Rs $si" co=`expr 100 + $r`

co=`expr $co / 100` i=2

ci=1 while [ $i -le $n ]

do ci=`expr $ci \* $co`

i=`expr $i + 1` done

ci=`expr $ci \* $p`

echo "The Compound Interest is: Rs $ci"

ccetstudent@EMCA:~$ sh simp.sh Enter the Principal Amount

5000 Enter the Rate of Interest

10 Enter the Number of Years

1 The Simple Interest is: Rs 500

The Compound Interest is: Rs 5000 ccetstudent@EMCA:~$ sh simp.sh

1 1

Enter the Principal Amount

5000 Enter the Rate of Interest

10 Enter the Number of Years

2 The Simple Interest is: Rs 1000

The Compound Interest is: Rs 5000

14. Write a Shell Program to calculate the sum of digits (without using loop) echo "Enter 5 Digit Number"

read num

d1=`expr $num % 10` num=`expr $num / 10`

d2=`expr $num % 10` num=`expr $num / 10`

d3=`expr $num % 10` num=`expr $num / 10`

d4=`expr $num % 10` num=`expr $num / 10`

d5=`expr $num % 10` sum=`expr $d1 + $d2 + $d3 + $d4 + $d5`

echo "Sum of 5 Digit Number="$sum ccetstudent@EMCA:~$ sh sum1.sh

Enter 5 Digit Number 12345

Sum of 5 Digit Number=15

15. Write a Shell Program to print the first “N” Odd Number echo "To Print the First N Odd Numbers"

echo "Enter the Number" read n

i=1 j=1

while [ $j -le $n ]

1 2

do

echo $i i=`expr $i + 2`

j=`expr $j + 1` done

ccetstudent@EMCA:~$ sh genodd.sh

To Print the First N Odd Numbers Enter the Number

5 1

3 5

7 9

16. Write a Shell Program to print the first “N” Even Number

echo "To Print the First N Even Numbers" echo "Enter the Number"

read n i=2

j=1 while [ $j -le $n ]

do echo $i

i=`expr $i + 2` j=`expr $j + 1`

done

ccetstudent@EMCA:~$ sh geneven.sh

To Print the First N Even Numbers Enter the Number

5 2

4 6

8 10

1 3

17. Write a Shell Program to Find the Factorial for a given Number echo "Enter a number: "

read num i=2

res=1 if [ $num -ge 2 ]

then while [ $i -le $num ]

do res=`expr $res \* $i`

i=`expr $i + 1` done

fi

echo "Factorial of $num = $res"

Output ccetstudent@EMCA:~$ sh fact.sh

Enter a number: 4

Factorial of 4 = 24

18. Write a Shell Program to Find the Factorial for a given “N” Number

echo "Enter the Number" read num

i=1

j=1 res=1

if test $j -eq 1 then

echo "The Factorial for the $j Number is="$j j=`expr $j + 1 `

fi while [ $j -le $num ]

do while [ $i -le $j ]

do res=`expr $res \* $i `

1 4

i=`expr $i + 1 `

done echo "The Factorial for the $j Number is="$res

res=1 i=1

j=`expr $j + 1 ` done

ccetstudent@EMCA:~$ sh fact.sh

Enter the Number 4

The Factorial for the 1 Number is=1 The Factorial for the 2 Number is=2

The Factorial for the 3 Number is=6 The Factorial for the 4 Number is=24

ccetstudent@EMCA:~$ sh fact.sh

Enter the Number 6

The Factorial for the 1 Number is=1 The Factorial for the 2 Number is=2

The Factorial for the 3 Number is=6 The Factorial for the 4 Number is=24

The Factorial for the 5 Number is=120 The Factorial for the 6 Number is=720

19. Write a Shell Program to compute the GCD for a Number

echo Enter two numbers with space in between

read a b

m=$a

if [ $b -lt $m ]

then

m=$b

1 5

fi

while [ $m -ne 0 ]

do

x=`expr $a % $m`

y=`expr $b % $m`

if [ $x -eq 0 -a $y -eq 0 ]

then

echo gcd of $a and $b is $m

break

fi

m=`expr $m - 1`

done

ccetstudent@EMCA:~$ sh gcd.sh

Enter two numbers with space in between

20 30

gcd of 20 and 30 is 10

20. Write a Shell Program to compute Power of x

echo "Input number"

read no echo "Input power"

read power counter=0

1 6

ans=1

while [ $power -ne $counter ] do

ans=`expr $ans \* $no` counter=`expr $counter + 1`

done echo "$no power of $power is $ans"

Output

Input number

3 Input power

4 3 power of 4 is 81

21. Write a Shell Program to Find the given Number is Prime or Not

i=2 rem=1

echo -e "Enter a number: \c" read num

if [ $num -lt 2 ]; then echo -e "$num is not prime\n"

exit 0 fi

while [ $i -le `expr $num / 2` -a $rem -ne 0 ]; do rem=`expr $num % $i`

i=`expr $i + 1`

done if [ $rem -ne 0 ]; then

echo "$num is prime\n" else

echo "$num is not prime\n" fi

Output

ccetstudent@EMCA:~$ sh prime1.sh

-e Enter a number: 4

1 7

4 is not prime

ccetstudent@EMCA:~$ sh prime1.sh

-e Enter a number: 7 7 is prime

22. Write a Shell Program to Find the First “N” Prime Number

echo "Enter a number: " read num1

i=2 j=2

k=0

while [ $j -lt $num1 ] do

num=$j while [ $i -lt $num ]

do if [ `expr $num % $i` -eq 0 ]

then k=1

fi i=`expr $i + 1`

done if [ $k -eq 0 ]

then echo "$num is Prime Number"

fi

j=`expr $j + 1 ` i=2

k=0 done

ccetstudent@EMCA:~$ sh prime.sh

Enter a number:

9 2 is Prime

3 is Prime 5 is Prime

1 8

7 is Prime

ccetstudent@EMCA:~$ sh prime.sh

Enter a number:

15 2 is Prime Number

3 is Prime Number 5 is Prime Number

7 is Prime Number 11 is Prime Number

13 is Prime Number

23. Write a Shell Program to Find the given Number is Armstrong Number or Not echo -n "Enter the number: "

read Number Length=${#Number}

Sum=0 OldNumber=$Number

while [ $Number -ne 0 ] do

Rem=$((Number%10)) Number=$((Number/10))

Power=$(echo "$Rem ^ $Length" | bc ) Sum=$((Sum+$Power))

done

if [ $Sum -eq $OldNumber ]

then echo "$OldNumber is an Armstrong number"

else echo "$OldNumber is not an Armstrong number"

fi

ccetstudent@EMCA:~$ sh ams1.sh Enter the number: 3445

3445 is not an Armstrong number

1 9

24. Write a Shell Program to reverse the digit of a given Number

echo "Program to Reverse the Digit" echo "Enter the Number"

read num reve=0

while [ $num -ne 0 ] do

reve=`expr $num % 10 + $reve \* 10` num=`expr $num / 10 `

done echo "The Reverse Digit is :"$reve

ccetstudent@EMCA:~$ sh rever.sh

Program to Reverse the Digit Enter the Number

123 The Reverse Digit is :321

ccetstudent@EMCA:~$ sh rever.sh

Program to Reverse the Digit Enter the Number

12345 The Reverse Digit is :54321

25. Write a Shell Program to Find the Sum of digit for a given Number

echo "Enter the Number"

read n sd=0

sum=0 while [ $n -gt 0 ]

do sd=$(( $n % 10 ))

n=$(( $n / 10 )) sum=$(( $sum + $sd ))

2 0

done

echo "Sum of all digits is $sum"

ccetstudent@EMCA:~$ sh sum.sh Enter the Number

1234 Sum of all digits is 10

26. Write a Shell program to execute various UNIX Commands using Case Statements

echo " MENU " echo "1. List of Files in the Current Directory"

echo "2. Today's Date"

echo "3. Display the Present Month of the Calendar" echo "4. Logged In Users"

echo "5. Display the Current Working Directory" echo "6. Quit from the Menu"

echo -n "Enter your Choice:" read ch

case $ch in 1) ls;;

2) date;; 3) cal;;

4) who;; 5) pwd;;

6) exit;; *) echo "invalid choice"

exit;;

esac

Enter your Choice:3

March 2013 Su Mo Tu We Th Fr Sa

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25 26 27 28 29 30 31

2 1

27. Write a Shell program to count the number of vowels in

a line of text

echo "Enter the text:" read s

l=`expr length $s` c=1

vc=0 while [ $c -le $l ] do

r=`expr substr $s $c 1` if [ $r = 'a' -o $r = 'e' -o $r = 'i' -o $r = 'o' -o $r = 'u' ]

then vc=`expr $vc + 1` fi

c=`expr $c + 1` done

echo "The number of vowels in the text $s is: $vc"

The number of vowels in the text love is: 2 ccetstudent@EMCA:~$ sh vow.sh

Enter the text:

manivannan The number of vowels in the text manivannan is: 4

28. Write a Shell program to find the sum of odd digits and

even digits from a number

# shell program to find the sume of odd digits and even digits

echo "Enter a number" read n

os=0 es=0

while [ $n -gt 0 ] do

r=`expr $n % 10`

if [ `expr $r % 2` = 0 ] then

es=`expr $es + $r`

2 2

else

os=`expr $os + $r` fi

n=`expr $n / 10` done

echo "The sum of odd digits is: $os" echo "The sum of even digits is: $es"

ccetstudent@EMCA:~$ sh oddeven.sh

Enter a number 1234

The sum of odd digits is: 4 The sum of even digits is: 6

29. Write a Shell program to find the smallest and larges

number from a set of given number

echo "Enter the number of elements:"

read n s=9999

s1=0 i=1

while [ $i -le $n ] do

echo "enter the numbers" read no

if [ $no -lt $s ] then

s=$no fi

if [ $no -gt $s1 ]

then s1=$no

fi i=`expr $i + 1`

done shecho "The smallest number is:$s"

echo "The greatest number is:$s1" ccetstudent@EMCA:~$ sh great.sh

Enter the number of elements: 4

2 3

enter the numbers

123 enter the numbers

456 enter the numbers

234 enter the numbers

336 The smallest number is:123

The greatest number is:456

30. Write a Shell program to check the given number and

its reverse are same

echo "Enter the Number" read n

# store Single Digit sd=0

# Stroe number in reverse order rev=""

#store original number on=$n

while [ $n -gt 0 ] do

sd=$(($n % 10 ))

n=$(($n / 10 )) rev=$(echo ${rev}${sd})

done echo "$on in a reverse order $rev"

if [ $on -eq $rev ]

then echo "The two Numbers are same"

else echo "The two Numbers are different"

fi

ccetstudent@EMCA:~$ sh rev.sh Enter the Number

123 123 in a reverse order 321

2 4

The two Numbers are different

31. Write a Shell program to generate Fibonacci Series

echo "Enter the Limit"

read n i=2

echo "Fibonacci Series" echo "-----------"

a=0 b=1

echo $a echo $b

while [ $i -lt $n ] do

c=`expr $a + $b` echo $c

a=$b

b=$c i=`expr $i + 1`

done

ccetstudent@EMCA:~$ sh fib.sh

Enter the Limit

5 Fibonacci Series

----------- 0

1 1

2 3

32. Write a Shell program to find the sum of square of Individual Digits

echo "Enter the Number"

read a

b=1 c=0

2 5

while [ $a -gt 0 ]

do b=`expr $a % 10`

c=`expr $c + $b \* $b \* $b` a=`expr $a / 10`

done echo "The Sum of Square of digits is "$c

ccetstudent@EMCA:~$ sh squ.sh

Enter the Number 12

The Sum of Square of digits is 9

33. Write a Shell program to find the sum of cube of

Individual digits of a given Numbers

echo "Enter the Number" read a

b=1 c=0

while [ $a -gt 0 ] do

b=`expr $a % 10` c=`expr $c + $b \* $b \* $b \* $b`

a=`expr $a / 10` done

echo "The Sum of Cube of digits is "$c

ccetstudent@EMCA:~$ sh cub.sh Enter the Number

12 The Sum of Cube of digits is 17

34. Write a Shell program to find the Smallest and Largest

digits of a numbers

echo "Enter a number:"

read n s1=9

s=0 while [ $n -gt 0 ]

2 6

do

r=`expr $n % 10` if [ $r -gt $s ]

then s=$r

fi if [ $r -le $s1 ]

then s1=$r

fi n=`expr $n / 10`

done echo "The largest digit is:$s"

echo "The Smallest digit is:$s1" ccetstudent@EMCA:~$ sh larg.sh

Enter a number:

2540235 The largest digit is:5

The Smallest digit is:0

35. Write a Shell program to compute Gross Salary of an

Employee

echo "Enter the basic salary:"

read basic if [ $basic -lt 1500 ]

then hra=`expr $basic \* 10 / 100`

da=`expr $basic \* 90 / 100` else

hra=500 da=`expr $basic \* 98 / 100`

fi

gs=`expr $basic + $hra + $da` echo "HRA:$hra"

echo "DA:$da" echo "Gross Salary: $gs"

ccetstudent@EMCA:~$ sh gross.sh

Enter the basic salary: 14000

2 7

HRA:500

DA:13720 Gross Salary: 28220

36. Write a Shell program to find the Degree of X in a

Quadratic Equation

echo "enter the value for a"

read a echo "enter the value for b"

read b echo "enter the value for c"

read c d=`expr $b \* $b - 4 \* $a \* $c`

x1=`echo "scale=3; (-$b + sqrt($d)) / (2 * $a)" | bc` x2=`echo "scale=3; (-$b - sqrt($d)) / (2 * $a)" | bc`

echo "Root 1: $x1" echo "Root 2: $x2"

ccetstudent@EMCA:~$ sh qua.sh

enter the value for a 3

enter the value for b 5

enter the value for c 2

Root 1: -.666 Root 2: -1.000

37. Write a Shell program to display the digits which are in

Odd Position in a given Number

#shell program to display the digits which are in odd position

echo "Enter a number" read n

i=1 while [ $n -gt 0 ]

do r=`expr $n % 10`

2 8

if [ `expr $i % 2` -ne 0 ]

then echo "The odd digits are: $r"

fi n=`expr $n / 10`

i=`expr $i + 1` done

ccetstudent@EMCA:~$ sh pos.sh

Enter a number 12567

The odd digits are: 7 The odd digits are: 5

The odd digits are: 1

38. Write a Shell program to Check the given String is

Palindrome or Not

echo "Enter the String"

read s l=`expr length $s`

c=1 p=""

while [ $c -le $l ]

do e=`expr substr $s $c 1`

p=$e$p c=`expr $c + 1`

done if [ $p = $s ]

then echo "palindrome"

else echo "Not palindrome"

fi

ccetstudent@EMCA:~$ sh pol.sh Enter the String

malayalam palindrome