стек

стек

Stack.

Here, 'стек' is used to mean 'stack', referring to a pile or a set of objects arranged in an orderly fashion.

Я сложил старые книги в стек.

I stacked old books into a stack.

In this context, 'стек' refers to a 'stack' in computer science, a data structure that operates on a last-in, first-out principle.

Программа использует стек для хранения данных.

The program uses a stack to store data.

The word 'стекла' is related to 'стек', but here it is a form of the verb 'стечь', meaning 'to flow down.' It shares an origin but functions differently as a verb.

После дождя вода стекла по стене.

After the rain, water flowed down the wall.