History

Andrii Siriak 91ec6f20f9 Fix build		2021-09-26 11:44:25 +03:00
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BalancedBrackets.java	Formatted with Google Java Formatter	2020-10-24 10:23:28 +00:00
DecimalToAnyUsingStack.java	Fix build	2021-09-26 11:44:25 +03:00
InfixToPostfix.java	Format with google formatter	2020-10-27 11:23:46 +08:00
NodeStack.java	Formatted with Google Java Formatter	2020-10-24 10:23:28 +00:00
README.md	create Readme.md for stacks (#2279 )	2021-08-23 11:07:33 +08:00
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StackArrayList.java	Formatted with Google Java Formatter	2020-10-24 10:23:28 +00:00
StackOfLinkedList.java	Formatted with Google Java Formatter	2020-10-24 10:23:28 +00:00

STACK

stack is an ADT (abstract data type ) that act like list of objects but there is a diffrents.

stack act is LIFO (Last In First Out), it means that when we want to get an element from the stack we get the last element in the stack.

stack is bast on two methods ( functions)

push & pop

push: add an alement to last index of stack.

for example: we have 1, 3, 5 in stack, then we call push(9),

9 will add to last index of stack -> 1, 3, 5 , 9

pop: remove the last element from stack. for example: we have 1, 3, 5 , 9 in stack, then we call pop(),

the function will return 9 and the stack will change to 1, 3, 5.