diff --git a/25lesson.py b/25lesson.py
new file mode 100644
index 0000000..719a5a5
--- /dev/null
+++ b/25lesson.py
@@ -0,0 +1,19 @@
+pptNames = ['pyae','phyo','thant']
+# add new data
+pptNames.append('Chinese')
+# print('pptNames Updated',pptNames)
+
+# rempve() 
+# toRemoveName = pptNames[3]
+# toRemoveName = pptNames[-1]
+# print('toRemoveName',toRemoveName)
+# pptNames.remove(toRemoveName)
+# print('removed a name',pptNames)
+
+# pop()
+# pptNames.pop(3)
+# print(pptNames)
+
+# del keyword
+# del pptNames[3]
+# print('used del keyword',pptNames)
\ No newline at end of file
diff --git a/26MaxMin27.py b/26MaxMin27.py
new file mode 100644
index 0000000..503b5c4
--- /dev/null
+++ b/26MaxMin27.py
@@ -0,0 +1,61 @@
+# MaxMin
+numberList = [10,20,30,40,56,88,99,78,21]
+# print(max(numberList))
+# print(min(numberList))
+
+# reverse
+# numberList.reverse()
+# print(numberList)
+
+# index
+# print(numberList.index(99))
+
+# sum
+# print(sum(numberList))
+
+# sort
+# numberList.sort()
+# numberList.sort(reverse=True)
+# print(numberList)
+# sorting words
+
+# nameList = ['asusVivoBookLaptop','vaselineLotion','royaldDrink','alpinePurifiedDrinkingWater']
+# nameList.sort()
+# nameList.sort(reverse=True)
+# nameList.sort(key=len)
+# nameList.sort(key=len,reverse=True)
+# print(nameList)
+
+# slicing and remove
+# intejer_list = [1,2,3,6,5,4,9,7,8]
+
+# for i in intejer_list[:3]:
+#     print('to remove element',i)
+#     intejer_list.remove(i)
+
+# print(intejer_list)
+
+# list play
+# pptList = []
+# for i in range(1,10):
+#     double_value = i**2
+#     print('double_value of {} is : '.format(i),double_value)
+#     pptList.append(double_value)
+# print(pptList)
+# # max value 
+# print(max(pptList))
+# # smallest value
+# print(min(pptList))
+# # reverse value
+# pptList.reverse()
+# print('Reversed value of pptList is: ',pptList)
+
+# # index value
+# for i in pptList:
+#     index_value = pptList.index(i)
+#     print('index value of {}'.format(i),index_value)
+
+# Tuple to list
+tuple_list = (20,50,80)
+print(list(tuple_list))
+
diff --git a/README.md b/README.md
index 0ecaa70..ad02f8f 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1 @@
-> Learning Python Programming . . . 
-
-> Learning Python Programming Language 
+lesson 6
\ No newline at end of file
diff --git a/lesson6.py b/lesson6.py
new file mode 100644
index 0000000..6c622c1
--- /dev/null
+++ b/lesson6.py
@@ -0,0 +1,34 @@
+# function
+numbers = [1,2,3,4,5]
+# print(len(numbers))
+
+# import math
+import math
+# num = int(input('Enter number to make square root'))
+# print('Answer of {} is : {} '.format(num,math.sqrt(num)))
+
+# programmer defined functions
+# def ppt_function():
+    # print('this is def function')
+
+# ppt_function()
+    
+# add substract multiply and division
+def add(a,p):
+    return print('added value is : ',a+p)
+
+def substract(a,p):
+    return print('subtracted value is : ',a-p)
+
+def multiply(a,p):
+    return print('multiply value is : ', a*p)
+
+def division(a,p):
+    return print('divided value is : ', a/p)
+
+add(5,4)
+substract(5,4)
+multiply(5,4)
+division(5,4)
+print('Calculated')
+