11 basic shell programs enough for ignou exams observe syntax

8/3/2019 11 Basic Shell Programs Enough for IGNOU Exams Observe Syntax

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Program 1

WAP to concatenate the contents of 2 files ?

cat > first

hai this is first file^d

cat > second

hai this is Second file

^d

program

-------

vi prog1echo contents of first file

cat first

echo contents of second file

cat second

echo contents of third file

cat first second > third

cat third

esc : x

output

------

sh prog1

Program 2

WAP to Find SUm,AVG,PRODUCT of 4 numbers ?

vi prog2

clearecho enter A,B,C,D values

read a

read b

read c

read d

sum= Èxpr $a + $b + $c + $d`

Avg= Èxpr $sum /4`

Product= Èxpr $a \* $b \* $c \*d`


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echo Sum is $sum

echo Avg is $Avg

echo Product is $ Product

esc:x

output

------

sh prog2

Program 3

WAP to change two values with out using another variable ?

vi prog3

clearecho enter A,B values

read a

read b

echo actual values are A="$a" and B="$b"

a=Èxpr $a + $b`

b=Èxpr $a - $b`

a=Èxpr $a - $b`

echo swapped values are "A"=$a and "B"=$b

esc:x

output

-----

sh prog3

Program 4

WAP to find largest of 3 numbers

vi prog4

clear

read a

read b

read c

if [$a -eq $b -a $b -eq $c

then

echo 3 numbers are equal


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elif [$a -gt $b -a $a -gt $c]

then echo $a is Bigger

elif [$b -gt $c]

then echo $b is Bigger

elseecho $c is Bigger

fi

output

------

sh prog4

Program 5

WAp to find the Factorial of a given number

vi prog5

clear

echo enter the number to get Factorial

read n

fact=1

i=$n

while [$n -ge 1]do

fact =`Expr $fact \* $n`

n=`Expr $n-1`

done

echo Factorial of $i is $fact

output

------

sh prog5

Program 6

WAP to find the Sum of INDIVIDUAL digits of given numbers

vi prog6

clear

echo enter any number having atleast 2 digits

read ni=$n


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r=0

sum=0

while test $n -gt 0

do

r=Èxpr $n %10`sum=Èxpr $sum + $r`

n=Èxpr $n/10`

done

echo sum of individual digits of $i is $sum

output

-------

sh prog6

Program 7

WAP to find the reverse of a given number

vi prog7

clear

echo enter a number

read n

m=$n

x=0

while test $n -gt 0

do

r=Èxpr $n %10`

x=Èxpr $x \*10 + $r`

n=Èxpr $n/10`

done

echo reverse of given number is $x

output

------

sh prog7

Program 8

WAP to generate fibnacci series

vi prog8

clear

echo enter any number

read n


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fo=0

f1=1

echo $fo

echo $f1

i=2

while test $i le $n

do

f2=Èxpr $fo + $f1`

echo $f2

f0=$f1

f1=$f2

i=Èxpr $i+1`

done

output

------

sh prog8

Program 9

WAP to check whether a given number is PALLENDROME or NOT

vi prog9

echo enter any number

read n

x=0

m=$n

while test $n -gt 0

do

r=Èxpr $n%10`

x=Èxpr $x \*10 +r`

n=Èxpr $n/10`

done

if test $x -eq $m

then

echo given number is PALLENDROME

else

echo given number is NOT a PALLENDROME

fi

output

------

sh prog9


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Program 10

Write a menu Driven Prog

vi prog10

clearecho "1.Contents of a FILE "

echo

echo "2.Present Working Directory"

echo

echo "3.EXIT"

echo

echo "Enter your Choice"

read ch

case $ch in1)echo enter file name

read filename

cat $filename

;;

2)echo present working directory

pwd

;;

3)echo program EXIT

;;

*)echo Incorrect choice;;

esac

output

-------

sh prog10

Program 11

WAP to count the no.of UPPER case letters , no.of lowercase letters, no.of digits

and no.of DIGITS and no.of Special characters in a given string

vi prog11

clear

echo enter a string

read s

len=`echo $s |wc-c`

h=`echo $len -1`

echo length is $h

u=0


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l=0

d=0

sc=0

while test $n -gt 0

doa=ècho $s |cat-c $n`

case $a in

[a-z])

l=Èxpr $l+1`

;;

[A-Z])

u=Èxpr $u+1`

;;

[0-9])

d=Èxpr $d+1`

;;

*)

sc=Èxpr $sc+1`

;;

esac

n=Èxpr $n-1`done

echo no.of uppercase letters are $u

echo no.of lowercase letters are $l

echo no.of digits are $d

echo no.of special characters are $sc

11 basic shell programs enough for ignou exams observe syntax

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