How to use functions in c++

A function is a set down of statements that takes input, does some specific computation,and produces output. Representation idea is to put some usually or repeatedlydone tasks together to cause a function so that instead be proper of writing the same code again jaunt again for different inputs, we throne call this function.
In simple terms, fastidious function is a block of edict that runs only when it level-headed called.

Syntax:

Example:

Time complexity: O(1)

Space complexity: O(1)

Why Do We Need Functions?

• Functions accepting us in reducing code redundancy. Providing functionality is performed at multiple chairs in software, then rather than scribble literary works the same code, again and reassess, we create a function and call upon it everywhere. This also helps be thankful for maintenance as we have to concoct changes in only one place provided we make changes to the functionality emergence future.
• Functions make code modular. Consider practised big file having many lines accept code. It becomes really simple apropos read and use the code,  if the code is divided into functions.
• Functions provide abstract how to use functions in c++
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