SHELL PROGRAM

ARMSTRONG NUMBER 

echo"Enter the number"

read n

t=$n

s=0

b=0

c=10

while[$n -st $b]

do 

r='expr $n%$c'

i='expr $r \*$r\*$r'

s='expr $s + $i'

n='expr $n / $c'

done

echo a$s

if[ $s -eq $t]

then 

echo"Armstrong number"

else "Not an Armstrong number"

fi

THE GIVEN NUMBER IS PRIME OR NOT

echo"Enter a number:"

read n

flag=0

for((i=2;i<=n/2;i++))

do

r='expr $n %$i'

if[ $r = 0]

then

flag=1

break

fi

done

if [ $flag = 0]

then

 echo"$n is a prime number"

else

echo"$n is not a prime number"

fi

SHELL PROGRAM

QUADRATIC EQUATION

echo"Enter a value:"

read a

echo "Enter a value:"

read b

echo "Enter a value:"

read c

x1=echo "scale=7;(-$b+sqrt($b^2-4*$a*$c))/(2*$a)"|bc'

x2=echo "scale=7;(-$b-sqrt($b^2-4*$a*$c))/(2*$a)"|bc'

echo $x1

echo $x2

SUM OF CUBE OF INDIVIDUAL DIGITS OF A NUMBER

echo"Enter a number:"

read n

t=$n

s=0

while[ $n -gt 0 ]

do 

r='expr $n % 10'

s='expr $s +$r\*$r\*$r'

n='expr $n / 10'

done

echo"The sum of cube of individual digits of $t is $s"

SHELL PROGRAM

FIBONACCI SERIES OF A NUMBER

echo"Enter how many numbers: "

read num

num1=0

num2=1

echo"Fibonacci series:"

echo $num1

echo $num2

count=2

while[ $count-le $num ] 

do 

num3='expr $num1 + $num2'

echo $num3

num1=$num2

num2=$num2

count='expr 4count + 1'

done

DISPLAY TEN LEAP YEARS

for((i=2000;i<=2036;i++))

do

if['expr $i%400'=0]

then

echo"$i is a leap year "

elif['expr $i % 4'=0 -a 'expr $i % 100'!=0]

then

echo"$i is a leap year"

fi

done 

SHELL PROGRAMS

THE SUM OF 'n' DIFFERENT NUMBERS

echo"Enter the number of elements:"

read n

s=0

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

do 

echo"Enter the number: "

read no 

s='expr $s+$no'

done

echo"This sum is :$s"

REVERSE OF A GIVEN NUMBER 

if  [ $# -eq 1 ]

then 

if [ $1 -gt 0 ]

then 

num=$1

sumi=0

while [ $num -ne 0 ]

do 

lnum='expr $num % 10'

sumi='expr $num * 10  + $lnum '

num='expr $num / 10'

done

echo"Reverse of digits is $sumi of $1 "else

echo"Number is less than  0"

fi

else

echo"Insert only one parameter "

fi

SHELL PROGRAMS

LARGEST AMONG 'n' NUMBERS

echo"Enter the number of elements:"

read n

l=0

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

do 

echo"Enter the number:"

read no

if[$no -gt$l]

then l=$no

fi

done

echo"The largest number is:$l"

THE LARGEST DIGIT OF A NUMBER

echo"Enter a number:"

read n

s=0

while [ $n -gt 0 ]

do 

r='expr $n%10'

if[$r -gt $s]

then 

s=$r

fi

n='expr $n/10'

done 

echo"The largest digit is:$s"