Fibonacci Series

Algorithm
Step 1 : Start
Step 2 : Read number of terms as n
Step 3 : Initialize 0 to f1, 1 to f2 and 2 to i
Step 4 : Print initial fibonacci terms f1, f2
Step 5 : Generate next term using the formula f3 = f1 + f2
Step 6 : Print f3
Step 7 : Increment i by 1
Step 8 : Assign f2 to f1
Step 9 : Assign f3 to f2
Step 10 : Repeat steps 5–9 until i 􀁤 n
Step 11 : Stop

Program (fibo.sh)
# Fibonacci series using while loop
echo -n "Enter number of terms : "
read n
echo "Fibonacci Series"
f1=0
f2=1
echo -n "$f1 "
echo -n " $f2 "
i=2

PROGRAM TO DETERMINE WHETHER THE GIVEN YEAR IS LEAP YEAR

echo enter a year

read n

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

then

echo leap year

else

echo not a leap year

fi

~

~

OUTPUT

[staff@linuxserver staff]$ sh leap

enter a year

2008

leap year

[staff@linuxserver staff]$ sh leap

enter a year

2009

not a leap year

 PROGRAM TO GENERATE THE FINOCCI SERIES

echo "enter the number"

read n

echo "The result is"

c=0

a=0

b=1

echo "$a"

echo "$b"

n=`expr $n - 2`

while test $n -ne 0

do

c=`expr $a + $b`

echo "$c"

a=$b

b=$c

n=`expr $n - 1`

done

~

OUTPUT:

[eceb33@linuxserver eceb33]$ sh fiboo

enter the number

8

The result is

0

1

1

2

3

5

8

13