Each node of a STACK contains the following information:

Q. Each node of a STACK contains the following information :

(i) Pin code of a city,

(ii) Name of city

Write a program to implement following operations in above stack

(a) PUSH () To push a node in to the stack.

(b) POP( ) To remove a rode from the stack.

You can understand by Watching video :-

Answer =

stack = [ ]
while True :
    print()
    print("Enter your choice as per given -")
    print("1 = For insert data Enter insert ")
    print("2 = For delete data enter delete ")
    print("3 = For Exit  enter exit ")
    print()
    user = input("Enter your choice :- ")
    if user == "insert" :
        pin = int(input("Enter the pin code of city :- "))
        city = input("Enter name of city :- ")
        data = [ pin , city ]
        stack.append(data)
    elif user == "delete" :
        if stack == [ ]:
            print("Under Flow")
        else :
            stack.pop()
    else :
        break
    print("Now our stack = ",stack)

Output :-

Enter your choice as per given -
1 = For insert data Enter insert
2 = For delete data enter delete
3 = For Exit  enter exit

Enter your choice :- insert
Enter the pin code of city :- 100059
Enter name of city :- Delhi
Now our stack =  [[100059, 'Delhi']]

Enter your choice as per given -
1 = For insert data Enter insert
2 = For delete data enter delete
3 = For Exit  enter exit

Enter your choice :- insert
Enter the pin code of city :- 000000
Enter name of city :- India
Now our stack =  [[100059, 'Delhi'], [0, 'India']]

Enter your choice as per given -
1 = For insert data Enter insert
2 = For delete data enter delete
3 = For Exit  enter exit

Enter your choice :- insert
Enter the pin code of city :- 168974
Enter name of city :- Lucknow
Now our stack =  [[100059, 'Delhi'], [0, 'India'], [168974, 'Lucknow']]

Enter your choice as per given -
1 = For insert data Enter insert
2 = For delete data enter delete
3 = For Exit  enter exit

Enter your choice :- delete
Now our stack =  [[100059, 'Delhi'], [0, 'India']]

Enter your choice as per given -
1 = For insert data Enter insert
2 = For delete data enter delete
3 = For Exit  enter exit

Enter your choice :- delete
Now our stack =  [[100059, 'Delhi']]

Enter your choice as per given -
1 = For insert data Enter insert
2 = For delete data enter delete
3 = For Exit  enter exit

Enter your choice :- exit
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