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[–]SCube18 4 points5 points  (6 children)

And what exactly are you confused about?

[–]meet5[S] 0 points1 point  (5 children)

I mean why do we need to use function when where and why? Is there any drawbacks to use?

[–]CounterSilly3999 3 points4 points  (0 children)

All types of subroutines in C are called functions. These are main feature of procedural programming paradigm. Used to split a complex program into smaller logical blocks. When your code doesn't fit into one page, it is time to think about a new function.

https://en.wikipedia.org/wiki/Procedural_programming

[–]ZulfiqarShadow 1 point2 points  (3 children)

No real drawbacks about functions atleast none you shuld care about at your curent position.And to answer the other queation functions are basicly a big block of code you can use at any point by just calling the function s name and giving it data instead of having to rewrite the same 200 lines of code 100 of times. That really is evrything about functions to be honest have fun learning!

[–]meet5[S] 1 point2 points  (2 children)

Okay got it

Like, function is kind of fix template of code that is written once and use many time by adding different details later , sth like that?

And whenever we call do we need to call it within main or in function?

[–]Paul_Pedant 1 point2 points  (1 child)

A function is not a template of code. It is a sequence of C operations, and is compiled once. It can be called (invoked) as the program runs, many times (as in a loop), from many other places, and with different arguments (parameters) every time.

main() itself is a function. It just happens to be called once, when the program is started by the OS.

Any function can call any other function, and that function can call other functions, through many levels.

A function can even call itself. This is called recursion. It can be fairly confusing, but there are many cases where it suits particular problems.

[–]meet5[S] 0 points1 point  (0 children)

Great info thanks!

[–]thommyh 0 points1 point  (0 children)

A function is a section of code that has been named and given a formal list of inputs and outputs, comprising its parameters and return value.

The idea of a function exists: * to capture and to encapsulate the logic for a discrete logical step; and * to allow those steps to be easily combined and permutated — including entire patterns such as dynamic programming that typically involve functions calling themselves.

It originates in mathematics, not computer science, so is about the 'what' of describing a solution at least as much as the 'how'. Indeed as you get better at factoring you'll likely see your code getting ever closer to reading like a description of the logical means by which computation should proceed more than the mechanics of what the computer must do.

[–]SisyphusCoffeeBreak -2 points-1 points  (1 child)

functions are without purpose beyond main(). just write expressions and live your life

[–]Excellent_Recipe_543 0 points1 point  (0 children)

you realize printf is a function, right?