about the length of an array

Question

Please help~
what is the code for finding the length of an array?
e.g.
int arr[]={1,2,3,4}
how to output 4 for showing the length/number of elements in array arr

Answer 1

~ swim ~ is there any direct coding to find the length🤔

Answer 2

Thx~

Answer 3

Thx a lot~

Answer 4

~ swim ~ oh🤔will it be taught in sololearn?cuz i havnt finished all the chapters of C++ in sololearn yet so i dont know if it will be taught in the remining chapters

Answer 5

Could you suggest me some websites or apps for learning extended C++ materials ?

Answer 6

https://code.sololearn.com/cVovA5s6pzyr/

Answer 7

Manoah Thx~

Answer 8

Manoah
I previously learnt in sololearn that "&number" can show the address of the variable "number". So what does" &number + 1"mean?🤔

And is *(&number +1) a pointer?🤔how this minus variable "number"can output 4?
*(&numbers + 1) - numbers