https://pastebin.com/GVkLgAMH

1.Even odd
clear
echo "Enter the number"
read num
if ((num % 2==0))
then
echo "$num is even"
else
echo "$num is odd"
fi



2.Factorial number
clear
fec=1
echo "Enter an interger number"
read num
if (( num < 0 ))
then echo "Negative value is not allow"
else
for (( i=1; i<=num; ++i ))
do
fec=$(( fec * i ))
done
echo "$fec"
fi



3.fibonacci number
clear
echo -n "Enter a Number :"
read num
a=0
b=1
echo "The Fibonacci sequence for the number $num is : "
for (( i=0;i<=num;i++ ))
do
echo "$a "
next=$((a+b))
a=$b
b=$nextdone



4.GPA calculator
clear
echo "Enter the
read num
number"
if (( num >=80 ))
then echo "the result is A+"
elif ((num >= 70))
then echo "the result is A"
elif ((num >= 60))
then echo "the result is A-"
elif ((num >= 50))
then echo "the result is B+"
else
echo "you and your exam
went to hell"
fi




5.find the lowest number
clear
echo "Enter the 1st number"
read num1
echo "Enter the 2nd number"
read num2
echo "Enter the 3rd number"
read num3
if (( $num1 < $num2 ))
then if(( $num1 < $num3 ))
then echo "$num1 is lowest"
else echo "$num3 is lowest"
fi
elif (($num2 < $num1 ))
then if (($num2 <$num3 ))
then echo "$num2 is lowest"else echo "$num3 is lowest"
fi
fi



6.prime number check
clear
flag=0
echo "Enter the number"
read num
m=$(( num / 2 ))
for ((i=2; i<= $m; i++ ))
do
if(( $num % i ==0 ))
then echo "$num is not prime "
flag=1
exit 0
fi
done
if(( $flag == 0))
then echo "$num is prime"
fi


7.Palindrome
num=545

# Storing the remainder
s=0

# Store number in reverse
# order
rev=""

# Store original number
# in another variable
temp=$num

while [ $num -gt 0 ]
do
    # Get Remainder
    s=$(( $num % 10 ))

    # Get next digit
    num=$(( $num / 10 ))

    # Store previous number and
    # current digit in reverse
    rev=$( echo ${rev}${s} )
done

if [ $temp -eq $rev ];
then
    echo "Number is palindrome"
else
    echo "Number is NOT palindrome"
fi








8. Fibonacci
# Program for Fibonacci
# Series

# Static input fo N
N=6

# First Number of the
# Fibonacci Series
a=0

# Second Number of the
# Fibonacci Series
b=1

echo "The Fibonacci series is : "

for (( i=0; i<N; i++ ))
do
    echo -n "$a "
    fn=$((a + b))
    a=$b
    b=$fn
done
# End of for loop




9.Prime or not
#storing the number to be checked
number=43
i=2

#flag variable
f=0

#running a loop from 2 to number/2
while test $i -le `expr $number / 2`
do

#checking if i is factor of number
if test `expr $number % $i` -eq 0
then
f=1
fi

#increament the loop variable
i=`expr $i + 1`
done
if test $f -eq 1
then
echo "Not Prime"
else
echo "Prime"
fi



10.Average of given numbers in Bash
# Total numbers
n=5

# copying the value of n
m=$n

# initialized sum by 0
sum=0

# array initialized with
# some numbers
array=(1 2 3 4 5)

# loop until n is greater
# than 0
while [ $n -gt 0 ]
do
    # copy element in a
    # temp variable
    num=${array[`expr $n - 1`]}

    # add them to sum
    sum=`expr $sum + $num`

    # decrement count of n
    n=`expr $n - 1`
done

# displaying the average
# by piping with bc command
# bc is bash calculator
# command
avg=`echo "$sum / $m" | bc -l`
printf '%0.3f' "$avg"





11.Bash shell script to find sum of digits
# !/bin/bash

# Program to find sum
# of digits

# Static input of the
# number
Num=123
g=$Num

# store the sum of
# digits
s=0

# use while loop to
# caclulate the sum
# of all digits
while [ $Num -gt 0 ]
do
    # get Remainder
    k=$(( $Num % 10 ))

    # get next digit
    Num=$(( $Num / 10 ))

    # calculate sum of
    # digit
    s=$(( $s + $k ))
done
echo  "sum of digits of $g is : $s"