List Python

 # list allow to store multiple items of same/different data types in a single variable.

#  property- index 0 based

#  ordered

#  mutable

#  duplicates allowed

# fruits=["apple","banana","mango","kibi"]

# print(fruits)

# print(type(fruits))

# print(len(fruits))

# if "banana" in fruits:

#     print("true")

# if "papaya" not in fruits:

#     print("true")

# accessing element of list

# 1 indexing

# 2 negative index

# print(fruits[1])

# print(fruits[-2])

# sublist

# 3 range of indexes

# 4 range of negative index

# print(fruits[0:3])

# print(fruits[-3:])

# adding element to a list

# append() - add element at end of list

# fruits.append("grapes")

# print(fruits)

# insert() - add element at given index

# fruits.insert(1,"papaya")

# print(fruits)

# extend()- add another list in back

# veg=["onion","tomato"]

# fruits.extend(veg)

# print(fruits)

# removing element from list

# 1- remove()- remove first occurence of given item

# fruits.remove("apple")

# print(fruits)

# 2- pop()- remove item from end or given index

# fruits.pop()

# print(fruits)

# fruits.pop(1)

# print(fruits)

# changing item in list

# arr=[10,20,30,40]

# arr[1]=200

# print(arr)

# arr[1:3]=[200,300]

# print(arr)

# sorting a list

# lest=[50,10,40,60,20]

# lest.sort()

# print(lest)

# descending order

# lest.sort(reverse=True)

# print(lest)

# reverse()

# lest.reverse()

# print(lest)

# LIST COMPREHENSION- when we want to make a new list from item of existing list.

# list=[10,40,60,90,20,30]

# new_list=[i for i in list if i>25]

# print(new_list)

# COPY OF LIST-

# new_copy_list=list.copy()

# print(new_copy_list)

# CONCATE 2 LISTS-

# l1=[1,2,3]

# l2=[4,5,6]

# l2=l2+l1

# print(l2)

# NESTED LIST - [10 , 20 , [30 , 40 ] , 50, 60]

#        index-   0,   1    2           3    4

# list=[10,20,30]

# list.insert(1,[18,19])

# print(list)

# print(list[1][1])  -> 19

# swap 2 elements in list

# list=[23,65,19,90]

# t=list[0]

# list[0]=list[2]

# list[2]=t

# print(list)

# input of list

# n=int(input("enter size of list ="))

# list=[]

# for i in range(n):

#     num=int(input("enter value ="))

#     list.append(num)

# print(list)