What's "IEnumerable<T>" function in C#?

Question

I know that "IEnumerable<T>" is a generic type, but I'm not understanding its function on C#. Can someone explain me?

Answer 1

A List is usually used for looping through it, but you can do more things with Lists, like add things to them, or pick out a single element in the middle of a list like `myList[10]`. IEnumerables are things you can only loop through ("enumerate"), nothing else.

All Lists are IEnumerable, but not all IEnumerables are Lists.
For example you could write an IEnumerable that generates all prime numbers; it doesn't fit in a List because the list would be infinite, but you could generate one after the other no problem.

You can step through any IEnumerable with a for loop.

foreach(var item in myIEnumerable){ ... }

IEnumerables are also used in LINQ if you are familiar with that.

Answer 2

Hey! Here is an example. Hopefully it's painfully clear.

https://code.sololearn.com/cbT1sok2tlcl/?ref=app