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Tuesday, January 24, 2023
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
10. Check strong number.
PROGRAM:
echo "Enter the number:"
read n
fact=1
if [ $n -eq 0 ]
then
echo "fact = "1
else
for i in `seq 1 $n`
do
fact=`expr $fact \* $i`
done
echo "fact = $fact"
fi
OUTPUT:
[bgc@localhost ~]$ sh 11.sh
Enter a number:
145
145 is a strong number
[bgc@localhost ~]$ sh 11.sh
Enter a number:
2
2 is a strong number
[bgc@localhost ~]$ sh 11.sh
Enter a number:
23
23 is not a strong number
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
9. Check if a number is prime fibonacci.
PROGRAM:
echo "enter the ending range of the series:"
read n
a=0
b=1
d=0
echo "The series is:"
if [ $n -le 2 ]
then
echo "null"
else
while [ $d -le $n ]
do
d=`expr $a + $b`
c=0
e=1
while [ $e -le $d ]
do
if [ `expr $d \% $e` -eq 0 ]
then
c=`expr $c + 1`
fi
e=`expr $e + 1`
done
if [ $c -eq 2 ]
then
if [ $d -le $n ]
then
echo $d
fi
fi
a=$b
b=$d
done
fi
OUTPUT:
[bgc@localhost ~]$ sh 10.sh
enter the ending range of the series:
100
The series is:
2
3
5
13
89
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
8.Print twin prime numbers within a range.
PROGRAM:
echo "enter a range:"
read a
read b
n=$a
while [ $n -le $b ]
do
c=0
d=1
while [ $d -le $n ]
do
if [ `expr $n \% $d` -eq 0 ]
then
c=`expr $c + 1`
fi
d=`expr $d + 1`
done
if [ $c -eq 2 ]
then
f=$n
e=`expr $n + 2`
m=$e
c=0
d=1
while [ $d -le $m ]
do
if [ `expr $m \% $d` -eq 0 ]
then
c=`expr $c + 1`
fi
d=`expr $d + 1`
done
if [ $c -eq 2 ]
then
echo "twin prime pair=$f,$e"
fi
fi
n=`expr $n + 1`
done
OUTPUT:
enter a range:
2
10
twin prime pair=3,5
twin prime pair=5,7
[bgc@localhost ~]$ sh 9.sh
enter a range:
3
100
twin prime pair=3,5
twin prime pair=5,7
twin prime pair=11,13
twin prime pair=17,19
twin prime pair=29,31
twin prime pair=41,43
twin prime pair=59,61
twin prime pair=71,73
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
7. Prime number checking.
PROGRAM:
echo "enter a number:"
read n
c=0
d=1
while [ $d -le $n ]
do
if [ `expr $n \% $d` -eq 0 ]
then
c=`expr $c + 1`
fi
d=`expr $d + 1`
done
if [ $c -eq 2 ]
then
echo "prime number"
else
echo "not a prime number"
fi
OUTPUT:
[bgc@localhost ~]$ sh 8.sh
enter a number:
2
prime number
[bgc@localhost ~]$ sh 8.sh
enter a number:
1
not a prime number
[bgc@localhost ~]$ sh 8.sh
enter a number:
0
not a prime number
[bgc@localhost ~]$ sh 8.sh
enter a number:
5
prime number
[bgc@localhost ~]$ sh 8.sh
enter a number:
4
not a prime number
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
6. Print fibonacci series.
PROGRAM:
echo "enter number of elements of the fibonacci series:"
read n
a=0
b=1
if [ $n -eq 0 ]
then
echo "no elemnts"
else
if [ $n -eq 1 ]
then
echo 0
else
echo 0
echo 1
c=2
while [ $c -ne $n ]
do
d=`expr $a + $b`
echo $d
a=$b
b=$d
c=`expr $c + 1`
done
fi
fi
OUTPUT:
[bgc@localhost ~]$ sh 7.sh
enter number of elements of the fibonacci series:
6
0
1
1
2
3
5
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
5. Find out the factorial of a number.
PROGRAM:
echo "Enter the number:"
read n
fact=1
if [ $n -eq 0 ]
then
echo "fact = "1
else
for i in `seq 1 $n`
do
fact=`expr $fact \* $i`
done
echo "fact = $fact"
fi
OUTPUT:
[bgc@localhost ~]$ sh 6.sh
Enter the number:
3
fact = 6
[bgc@localhost ~]$ sh 6.sh
Enter the number:
2
fact = 2
[bgc@localhost ~]$ sh 6.sh
Enter the number:
0
fact = 1
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
4.Check a number whether it is odd positive,odd negative,even positive,even negative.
PROGRAM:
echo "enter a number:"
read n
if [ $n -ge 0 ]
then
if [ `expr $n % 2` -eq 0 ]
then
echo "$n is a even positive number"
else
echo "$n is a odd positive number"
fi
else
if [ `expr $n % 2` -eq 0 ]
then
echo "$n is a even negative number"
else
echo "$n is a odd negative number"
fi
fi
OUTPUT:
[bgc@localhost ~]$ sh 5.sh
enter a number:
3
3 is a odd positive number
[bgc@localhost ~]$ sh 5.sh
enter a number:
0
0 is a even positive number
[bgc@localhost ~]$ -9
bash: -9: command not found...
[bgc@localhost ~]$ sh 5.sh
enter a number:
-9
-9 is a odd negative number
[bgc@localhost ~]$ sh 5.sh
enter a number:
-10
-10 is a even negative number
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
3. Leap year checking.
PROGRAM:
echo "enter the year:"
read n
if [ `expr $n % 4` -eq 0 ]
then
if [ `expr $n % 100` -eq 0 ]
then
if [ `expr $n % 400` -eq 0 ]
then
echo "$n is a leapyear" #2000
else
echo "$n is not a leapyear" #1900
fi
else
echo "$n is a leapyear" #1996
fi
else
echo "$n is not a leapyear" #1997
fi
OUTPUT:
[bgc@localhost ~]$ sh pc2.sh
enter the year:
1996
1996 is a leapyear
[bgc@localhost ~]$ sh pc2.sh
enter the year:
2000
2000 is a leapyear
[bgc@localhost ~]$ sh pc2.sh
enter the year:
1997
1997 is not a leapyear
[bgc@localhost ~]$ sh pc2.sh
enter the year:
1900
1900 is not a leapyear
[bgc@localhost ~]$
Unix Shell Programming Example for B.Sc, B.Tech, BCA, MCA
2. Use of for loop.
PROGRAM:
echo "Enter number of elements:"
read n
for i in `seq 1 $n`
do
echo $i
done
OUTPUT:
[bgc@localhost ~]$ sh pc.sh
Enter number of elements:
3
1
2
3
[bgc@localhost ~]$
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