Question

Why typically a long program is divided into smaller functions or procedures?​

Answer 1

Answer:

There are a few potential benefits to breaking big functions up in to smaller functions. Often in large functions you have to do more-or-less the same thing many times. By generalizing this in to a single common function, you can use that one block of code in multiple places.

Answer 2

A long program is divided into smaller functions or procedures so that it becomes easy to understand.

• If a program is divided into smaller parts then it allows to test a part of the program individually without testing the whole program again and again.
• It makes easier for the programmer to understand the program.
• It becomes much easier to detect error in a program.
• It is easier to write a program in this manner.