List in Python

data= [11,12,10,5,1,0,8]
data
output is [11,12,10,5,1,0,8]

data[1]
output is 12

data[1:]
output is [12,10,5,1,0,8]

//  All these operations and tricks are same as the before like we did in "Variables in Python"
//  A list in python can also be treated as an array in python or similar to any other language (List is mutable)

names=['python','java','ruby','javascript']
names
output is ['python','java','ruby','javascript']

values=[1.25,0.00,'python','@#$',5]
values
output is [1.25,0.00,'python','@#$',5]

mydata=[data,names,values]
mydata
output is [[11,12,10,5,1,0,8],['python','java','ruby','javascript'],[1.25,0.00,'python','@#$',5]]

// List in python is mutable (you can change a single character or characters and replace with new one)

// use Ctrl+Space key to get a pop up when you type data.    // this popup will show you some methods

data.append(20)
data
output is [11,12,10,5,1,0,8,20]     // 20 gets added to the list at the end

data.insert(2,99)
data
output is [11,12,99,10,5,1,0,8,20]       // 99 gets inserted at the 2nd index....it is not replaced just got inserted at 2nd index

data.remove(5)
data
output is [11,12,10,1,0,8,20]         // element 5 gets removed from the list

data.pop(2)
output is 10
data
output is  [11,12,1,0,8,20]           // element 10 gets removed from the list as we used .pop(  ) before this


data.pop()
output is 20
data
output is [11,12,1,0,8]               // without specifying index number .pop() excecutes to remove the last element in the list
                                          (for more details about this refer the concept of Stacks in Data Structures)
                                          
                                          
del data[3:]
data
output is [11,12,1]                   //  del is used to delete multiple characters at a time specifing index number


data.extend([42,74,10.8,12.5])
TypeError: extend() takes only arguements......

// So, use [] inside ()

data.extend([42,74,10.8,12.5])
data
output is [11,12,1,42,74,10.8,12.5]          // .extend() helps to add the required elements in the list data at the end in continuation

// Some in-built functions

min(data)                           // find minimum value in list
output is 1

max(data)                           // find maximum value in list
output is 74

sum(data)                          // find Sum of all the elements in the list
output is 163.30

data.sort()
data                                   // sorts all the elements in the list in ascending order
output is [1,10.8,11,12,12.5,42,74]  


 // Quiz question
name="Hello Friends"
print(name[-4])
output=??                        // Quiz question  {Ans= e}