9.Python program to find Area of a circle

def findArea(r):

    PI = 3.142

    return PI * (r*r);

# Driver method

print(findArea(5))


@python_0

10 Python 3 code to find sum  of elements in given array

def _sum(arr,n):

    # return sum using sum 

    # inbuilt sum() function

    return(sum(arr))   

# driver function

arr=[]

# input values to list

arr = [12, 3, 4, 15]

# calculating length of array

n = len(arr)

ans = _sum(arr,n)  

# display sum

print (\'Sum of the array is \',ans)
 

@python_0

11.Python program to print Even Numbers in a List 

# list of numbers

list1 = [10, 21, 4, 45, 66, 93]  

# iterating each number in list

for num in list1:

    # checking condition

    if num % 2 == 0:

       print(num, end = " ")


@python_0

12.Python program to check if a string is palindrome or not


def isPalindrome(s):

    rev = s[::-1]

    # Checking if both string are equal or not

    if (s == rev):

        return True

    return False

# Driver code

s = "malayalam"

ans = isPalindrome(s)

if ans == 1:

    print("Yes")

else:

    print("No")



@python_0

13 function to check if small string is there in big string

def check(string, sub_str):

    if (string.find(sub_str) == -1):

        print("NO")

    else:

        print("YES")     

# driver code

string = "zeus is a programmer"

sub_str ="zeus"

check(string, sub_str)



@python_0

14.Function to find permutations of a given string

from itertools import permutations

def allPermutations(str):

     # Get all permutations of string 'ABC'

     permList = permutations(str)
  
     # print all permutations

     for perm in list(permList):

         print (''.join(perm))

# Driver program

if name == "__main__":

    str = 'ABC'

    allPermutations(str)

@python_0

15. Python3 code to find largest prime factor of number

import math

def maxPrimeFactors (n):

    maxPrime = -1

    while n % 2 == 0:

        maxPrime = 2

        n >>= 1     # equivalent to n /= 2
    for i in range(3, int(math.sqrt(n)) + 1, 2):

        while n % i == 0:

            maxPrime = i

            n = n / i

    if n > 2:

        maxPrime = n

    return int(maxPrime)

n = 15

print(maxPrimeFactors(n))

  

n = 25698751364526

print(maxPrimeFactors(n))

  
@python_0

16.Python Counter| Find all duplicate characters in string



from collections import Counter

 
def find_dup_char(input):

  
    WC = Counter(input)

    j = -1

   

    for i in WC.values():

        j = j + 1

        if( i > 1 ):

            print WC.keys()[j],

if name == "__main__":

    input = 'hellowelcome'

    find_dup_char(input)



@python_0

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