How to get array of numbers without user input ?

Question

The task is to add array of numbers from which the length of the arrays should not be declared and to use in for loop ??
Then what is the alternate to get an array of numbers without user declaring N ??

Answer 1

https://stackoverflow.com/questions/5963847/is-there-possibility-of-sum-of-arraylist-without-looping

https://stackoverflow.com/questions/28381956/enter-array-without-knowing-its-size

Answer 2

Rstar :-)