Top down and Bottom up programming

Question

Why do we say languages such as C are top-down while OOP languages like Java or C++ are bottom-up? Does this classification have any importance in software development?

Answer 1

Most of the procedural or low level languages follow Top-down approach like C language.Similarly high level languages like java ,c++ etc follows Bottom-Up Approach.

In Top-down approach,all the system or big functions are broken down into small subsystem whereas in Bottom-up approach,Small sub-system are combined together to develop a big and final system.

e.g.Recursive is top down approach while Iterative is Bottom up approach.