Stack Introduction .png
Stack Explanation .png
PYTHON CODE
class Stack:
def __init__(self):
self.items = []
def push(self,item):
self.items.append(item)
def is_Empty(self):
return len(self.items) == 0
def pop(self):
if self.is_Empty():
return None
else:
return self.items.pop()
def peek(self):
if self.is_Empty():
return None
else:
return self.items[-1]
def size(self):
return len(self.items)
myStack = Stack()
print(myStack.is_Empty())
print(myStack.size())
print(myStack.pop())
myStack.push(1)
myStack.push(2)
myStack.push(3)
myStack.push(4)
myStack.push(5)
print(myStack.is_Empty())
print(myStack.size())
print(myStack.peek())
print(myStack.pop())
print(myStack.pop())
print(myStack.peek())
print(myStack.size())
