How to add new element in python list :
list methods:
insert():insert method to add the object/element at the specified position in the list,insert method accepts two parameters position and object
syntax:
insert(index,object)
Ex:
list=[30,50,60,70,80]
list.insert(3,55)
print(list)
list.insert(3,[45,66,77]) #nested index
print(list)
output:[30,50,60,55,70,80]
[30,50,60,[45,66,77],80]
extend() or append() :
extend method will accept the list of elements and add them at the end of the list
Ex:
#using extend or append
mylist = list([5, 87, 'ravi', 3.50])
mylist.extend([25, 75, 10])
print(mylist)
output:[5, 87, 'ravi', 3.50,25, 75, 10]
#using extend or append
mylist = list([5, 87, 'ravi', 3.50])
mylist.append([25, 75, 10]) #append add new elements to nested index
print(mylist)
output:[5, 87, 'ravi', 3.50,[25, 75, 10]]
Modify:Modify the individual item, Modify the range of items.
Ex:
mylist = list([5, 10, 20, 30])
mylist[2]=90 #single element modified
print(mylist)
output:[5, 10, 90, 30]
#modify from 1st index to 3th
mylist[1:3]=[56,88,99]
print(mylist)
output:[5, 56, 88, 99, 30]
#modify from 2rd index to end
mylist[2:]=[34,55,66,77]
print(mylist)
output:[5, 56, 34, 55, 66, 77]
#modify all items
mylist=list([5,10,20,30])
for x in range(len(mylist)):
sqr=mylist[x]*mylist[x]
mylist[x]=sqr
print(mylist)
