diff --git a/Kadanes_Algorithm.py b/Kadanes_Algorithm.py
new file mode 100644
index 0000000..06b8f9e
--- /dev/null
+++ b/Kadanes_Algorithm.py
@@ -0,0 +1,18 @@
+def maxSubArraySum(arr,size):
+    
+    max_till_now = arr[0]
+    max_ending = 0
+    
+    for i in range(0, size):
+        max_ending = max_ending + arr[i]
+        if max_ending < 0:
+            max_ending = 0
+        
+        
+        elif (max_till_now < max_ending):
+            max_till_now = max_ending
+            
+    return max_till_now
+
+arr = [-2, -3, 4, -1, -2, 5, -3]
+print("Maximum Sub Array Sum Is" , maxSubArraySum(arr,len(arr)))
diff --git a/Merge Sort b/Merge Sort
new file mode 100644
index 0000000..c48ec79
--- /dev/null
+++ b/Merge Sort	
@@ -0,0 +1,80 @@
+# Python program for implementation of MergeSort
+
+# Merges two subarrays of arr[].
+# First subarray is arr[l..m]
+# Second subarray is arr[m+1..r]
+
+
+def merge(arr, l, m, r):
+	n1 = m - l + 1
+	n2 = r - m
+
+	# create temp arrays
+	L = [0] * (n1)
+	R = [0] * (n2)
+
+	# Copy data to temp arrays L[] and R[]
+	for i in range(0, n1):
+		L[i] = arr[l + i]
+
+	for j in range(0, n2):
+		R[j] = arr[m + 1 + j]
+
+	# Merge the temp arrays back into arr[l..r]
+	i = 0	 # Initial index of first subarray
+	j = 0	 # Initial index of second subarray
+	k = l	 # Initial index of merged subarray
+
+	while i < n1 and j < n2:
+		if L[i] <= R[j]:
+			arr[k] = L[i]
+			i += 1
+		else:
+			arr[k] = R[j]
+			j += 1
+		k += 1
+
+	# Copy the remaining elements of L[], if there
+	# are any
+	while i < n1:
+		arr[k] = L[i]
+		i += 1
+		k += 1
+
+	# Copy the remaining elements of R[], if there
+	# are any
+	while j < n2:
+		arr[k] = R[j]
+		j += 1
+		k += 1
+
+# l is for left index and r is right index of the
+# sub-array of arr to be sorted
+
+
+def mergeSort(arr, l, r):
+	if l < r:
+
+		# Same as (l+r)//2, but avoids overflow for
+		# large l and h
+		m = l+(r-l)//2
+
+		# Sort first and second halves
+		mergeSort(arr, l, m)
+		mergeSort(arr, m+1, r)
+		merge(arr, l, m, r)
+
+
+# Driver code to test above
+arr = [12, 11, 13, 5, 6, 7]
+n = len(arr)
+print("Given array is")
+for i in range(n):
+	print("%d" % arr[i]),
+
+mergeSort(arr, 0, n-1)
+print("\n\nSorted array is")
+for i in range(n):
+	print("%d" % arr[i]),
+
+# This code is contributed by Mohit Kumra
diff --git a/MergeSort.py b/MergeSort.py
new file mode 100644
index 0000000..615c286
--- /dev/null
+++ b/MergeSort.py
@@ -0,0 +1,71 @@
+def merge(arr, l, m, r):
+    n1 = m - l + 1
+    n2 = r - m
+ 
+    # create temp arrays
+    L = [0] * (n1)
+    R = [0] * (n2)
+ 
+    # Copy data to temp arrays L[] and R[]
+    for i in range(0, n1):
+        L[i] = arr[l + i]
+ 
+    for j in range(0, n2):
+        R[j] = arr[m + 1 + j]
+ 
+    # Merge the temp arrays back into arr[l..r]
+    i = 0     # Initial index of first subarray
+    j = 0     # Initial index of second subarray
+    k = l     # Initial index of merged subarray
+ 
+    while i < n1 and j < n2:
+        if L[i] <= R[j]:
+            arr[k] = L[i]
+            i += 1
+        else:
+            arr[k] = R[j]
+            j += 1
+        k += 1
+ 
+    # Copy the remaining elements of L[], if there
+    # are any
+    while i < n1:
+        arr[k] = L[i]
+        i += 1
+        k += 1
+ 
+    # Copy the remaining elements of R[], if there
+    # are any
+    while j < n2:
+        arr[k] = R[j]
+        j += 1
+        k += 1
+ 
+# l is for left index and r is right index of the
+# sub-array of arr to be sorted
+ 
+ 
+def mergeSort(arr, l, r):
+    if l < r:
+ 
+        # Same as (l+r)//2, but avoids overflow for
+        # large l and h
+        m = l+(r-l)//2
+ 
+        # Sort first and second halves
+        mergeSort(arr, l, m)
+        mergeSort(arr, m+1, r)
+        merge(arr, l, m, r)
+ 
+ 
+# Driver code to test above
+arr = [12, 11, 13, 5, 6, 7]
+n = len(arr)
+print("Given array is")
+for i in range(n):
+    print("%d" % arr[i]),
+ 
+mergeSort(arr, 0, n-1)
+print("\n\nSorted array is")
+for i in range(n):
+    print("%d" % arr[i])
diff --git a/README.md b/README.md
index c0b6a11..56568dc 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,12 @@
 ### This repo contains sorting program in Python.
 #### List of programs available here :
- - Bubble Sort
+ - Bubble Sort:is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements if they are in wrong order.
  - Insertion Sort
  - Heap Sort
  - Maximum of two numbers in Python
  - Python Program for simple interest
  - Python Program for factorial of a number
+ - Django and Flask are most Popular Python Framework
+ - Python use for ML Studies Also
+ - python widely use programming Language
  
diff --git a/Selectionsort.py b/Selectionsort.py
new file mode 100644
index 0000000..d2462ff
--- /dev/null
+++ b/Selectionsort.py
@@ -0,0 +1,21 @@
+import sys
+A = [64, 25, 12, 22, 11]
+
+# Traverse through all array elements
+for i in range(len(A)):
+	
+	# Find the minimum element in remaining
+	# unsorted array
+	min_idx = i
+	for j in range(i+1, len(A)):
+		if A[min_idx] > A[j]:
+			min_idx = j
+			
+	# Swap the found minimum element with
+	# the first element		
+	A[i], A[min_idx] = A[min_idx], A[i]
+
+# Driver code to test above
+print ("Sorted array")
+for i in range(len(A)):
+	print("%d" %A[i]),
diff --git a/Sort numeric strings in a list in Python by Naive Methodby b/Sort numeric strings in a list in Python by Naive Methodby
new file mode 100644
index 0000000..1496c3f
--- /dev/null
+++ b/Sort numeric strings in a list in Python by Naive Methodby	
@@ -0,0 +1,6 @@
+Naive Method
+ numeric string sorting
+for i in range(0, len(test_list)) :
+    test_list[i] = int(test_list[i])
+test_list.sort()
+print ("The resultant sorted list  : " +  str(test_list))
diff --git a/add two number b/add two number
new file mode 100644
index 0000000..8fbba12
--- /dev/null
+++ b/add two number	
@@ -0,0 +1,10 @@
+# This program adds two numbers
+
+num1 = 1.5
+num2 = 6.3
+
+# Add two numbers
+sum = num1 + num2
+
+# Display the sum
+print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))
diff --git a/area.py b/area.py
new file mode 100644
index 0000000..17b6b8e
--- /dev/null
+++ b/area.py
@@ -0,0 +1,10 @@
+#program to find area of circle using functions
+import math
+
+#Function that calculates area of circle
+def area_of_circle(r): 
+    a = r**2 * math.pi
+    return a
+
+r = float(input("Enter the radius of the circle: "))
+print("%.2f" %area_of_circle(r))
\ No newline at end of file
diff --git a/bullcowgame.py b/bullcowgame.py
new file mode 100644
index 0000000..99add60
--- /dev/null
+++ b/bullcowgame.py
@@ -0,0 +1,60 @@
+import random as rand
+import emoji as emo
+
+emo_cow = emo.emojize(emo.demojize('🐄'))
+emo_bull = emo.emojize(emo.demojize('🐂'))
+print('\n\033[1m' + ' --: Welcome to Cows (', emo_cow, ') and Bulls (', emo_bull, ') game :--' + '\033[0m')
+
+rand_num = rand.randrange(1000, 9999, 1)
+rand_num_list = list(str(rand_num).replace("", ""))
+
+trial = 0
+error_dig = 0
+error_let = 0
+
+while True:
+    user_num = input('Guess the 4 digit number : ')
+    user_num_list = list(str(user_num).replace("", ""))
+
+    def if_contain_letter(x):
+        for ele in x:
+            if ele.isalpha():
+                con = True
+            else:
+                con = False
+        return con
+
+    if len(user_num_list) != 4:
+        print(' DIGIT no. Error : \n Your entered number does not contain 4 digits')
+        error_dig += 1
+        if error_dig > 3:
+            print('*) WARNING !! What are you doing ? Too much errors ! Be careful !')
+
+    if if_contain_letter(user_num_list):
+        print('DIGIT type Error :\n inputted number contains letter ')
+        error_let += 1
+
+    if not if_contain_letter(user_num_list):
+        if len(user_num_list) == 4:
+            a = []
+            b = []
+
+            for i in range(len(user_num_list)):
+                if rand_num_list[i] == user_num_list[i]:
+                    a.append(user_num_list[i])
+
+                if rand_num_list[i] != user_num_list[i]:
+                    if user_num_list[i] in rand_num_list:
+                        b.append(user_num_list[i])
+
+            num_of_cow = len(a)
+            num_of_bull = len(b)
+            print(num_of_cow, ' cow (', emo_cow, ')')
+            print(num_of_bull, ' bull (', emo_bull, ')')
+            trial += 1
+
+    if str(user_num) == str(rand_num):
+        print('\n\033[1m' + '### Congratulations! , Well played ###' + '\033[0m')
+        print('Trials = ', trial)
+        print('Errors = ', error_dig + error_let)
+        break
diff --git a/c.py b/c.py
new file mode 100644
index 0000000..85a3502
--- /dev/null
+++ b/c.py
@@ -0,0 +1,29 @@
+def isVowel(c):
+    return (c == 'A' or c == 'E' or c == 'I' or
+            c == 'O' or c == 'U' or c == 'a' or
+            c == 'e' or c == 'i' or c == 'o' or
+            c == 'u');
+ 
+ 
+def pigLatin(s):
+ 
+    
+    length = len(s);
+    index = -1;
+    for i in range(length):
+        if (isVowel(s[i])):
+            index = i;
+            break;
+ 
+   
+    if (index == -1):
+        return "-1";
+ 
+  
+    return s[index:] + s[0:index] + "ay";
+ 
+str = pigLatin("graphic");
+if (str == "-1"):
+    print("No vowels found. Pig Latin not possible");
+else:
+    print(str);
\ No newline at end of file
diff --git a/calc.py b/calc.py
new file mode 100644
index 0000000..d335840
--- /dev/null
+++ b/calc.py
@@ -0,0 +1,32 @@
+opt = int(input("enter the option you want to perform : 1.addition 2.multiplication"))
+if opt==1:
+    s=0
+    n=int(input("enter how many times you want to sum up :"))
+    print("enter",n,"numbers : ")
+    for i in range(0,n):
+        a=int(input("enter the number"))
+        s=s+a
+    print("the result is : ",s)
+
+elif opt==2:
+    m=1
+    n1=int(input("how many times you want to multiply : "))
+    print("enter",n1,"numbers :")
+    for i in range(0,n1):
+        
+        b=int(input("enter the number :"))
+        m=m*b
+    print("the result is :",m)
+elif opt==3:
+    n2=int(input("how many times you want to substract :"))
+    print("enter", n2 ,"numbers: ")
+    a=int(input("enter the 1st number"))
+    b=int(input("enter the 2nd number"))
+    #c=(a-b)
+    d=(n2-2)
+    print("you have to enter ", d, "numbers more")
+    for i in range(0,d):
+        c=(a-b)
+        e=int(input("enter the number : "))
+        f=c-e
+        print("the result is :", f)
\ No newline at end of file
diff --git a/checkconnection.py b/checkconnection.py
new file mode 100644
index 0000000..88b9b16
--- /dev/null
+++ b/checkconnection.py
@@ -0,0 +1,11 @@
+from urllib.request import urlopen   ##importing necessary library this library contains all the modules for url status checking
+
+name=input("enter your name:")    ## entering the user name
+
+def status():          ## defining the function to check the status
+    try:
+        urlopen("https://www.youtube.com/",timeout=1)    ## if the url is openable then user is connected 
+        print(name,"you are connected to internet")
+    except:
+        print(name,"you are not connected to internet")   ## otherwise not connected
+status()   ## calling the status function
\ No newline at end of file
diff --git a/client-chat.py b/client-chat.py
new file mode 100644
index 0000000..bdfe862
--- /dev/null
+++ b/client-chat.py
@@ -0,0 +1,38 @@
+import socket 
+import select 
+import sys 
+  
+server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
+if len(sys.argv) != 3: 
+    print ("Correct usage: script, IP address, port number")
+    exit() 
+IP_address = str(sys.argv[1]) 
+Port = int(sys.argv[2]) 
+server.connect((IP_address, Port)) 
+  
+while True: 
+  
+    # maintains a list of possible input streams 
+    sockets_list = [sys.stdin, server] 
+  
+    """ There are two possible input situations. Either the 
+    user wants to give  manual input to send to other people, 
+    or the server is sending a message  to be printed on the 
+    screen. Select returns from sockets_list, the stream that 
+    is reader for input. So for example, if the server wants 
+    to send a message, then the if condition will hold true 
+    below.If the user wants to send a message, the else 
+    condition will evaluate as true"""
+    read_sockets,write_socket, error_socket = select.select(sockets_list,[],[]) 
+  
+    for socks in read_sockets: 
+        if socks == server: 
+            message = socks.recv(2048) 
+            print (message) 
+        else: 
+            message = sys.stdin.readline() 
+            server.send(message) 
+            sys.stdout.write("<You>") 
+            sys.stdout.write(message) 
+            sys.stdout.flush() 
+server.close() 
\ No newline at end of file
diff --git a/multiplication.py b/multiplication.py
new file mode 100644
index 0000000..0b507a5
--- /dev/null
+++ b/multiplication.py
@@ -0,0 +1,3 @@
+n=int(input("Multiplication Table of:"))
+for i in range(1,10+1):
+    print("{} X {} = {}".format(i,n,i*n))
\ No newline at end of file
diff --git a/solve quadratic b/solve quadratic
new file mode 100644
index 0000000..9304927
--- /dev/null
+++ b/solve quadratic	
@@ -0,0 +1,17 @@
+# Solve the quadratic equation ax**2 + bx + c = 0
+
+# import complex math module
+import cmath
+
+a = 1
+b = 5
+c = 6
+
+# calculate the discriminant
+d = (b**2) - (4*a*c)
+
+# find two solutions
+sol1 = (-b-cmath.sqrt(d))/(2*a)
+sol2 = (-b+cmath.sqrt(d))/(2*a)
+
+print('The solution are {0} and {1}'.format(sol1,sol2))
diff --git a/sum of even number b/sum of even number
new file mode 100644
index 0000000..cfe9bd8
--- /dev/null
+++ b/sum of even number	
@@ -0,0 +1,9 @@
+maximum = int(input(" Please Enter the Maximum Value : "))
+total = 0
+
+for number in range(1, maximum+1):
+    if(number % 2 == 0):
+        print("{0}".format(number))
+        total = total + number
+
+print("The Sum of Even Numbers from 1 to {0} = {1}".format(number, total))
diff --git a/sum of oddno.py b/sum of oddno.py
new file mode 100644
index 0000000..0d9163c
--- /dev/null
+++ b/sum of oddno.py	
@@ -0,0 +1,5 @@
+n=int(input("Enter n value:"))
+sum=0
+for i in range(1,n+1,2):
+    sum+=i
+print(sum)
\ No newline at end of file
diff --git a/swap in python b/swap in python
new file mode 100644
index 0000000..22a78b5
--- /dev/null
+++ b/swap in python	
@@ -0,0 +1,16 @@
+# Python program to swap two variables
+
+x = 5
+y = 10
+
+# To take inputs from the user
+#x = input('Enter value of x: ')
+#y = input('Enter value of y: ')
+
+# create a temporary variable and swap the values
+temp = x
+x = y
+y = temp
+
+print('The value of x after swapping: {}'.format(x))
+print('The value of y after swapping: {}'.format(y))