Thread: How to find the last value in an array

Wouldn't the last value in the array arr[30] just be arr[29]? Otherwise, you need to pick a way to mark an element as invalid and just iterate backwards through the array until you find an element that is valid.

Originally Posted by mkanimozhi

ex the last value in the arr[15].


thanks and regards,
kanimozhi.m

I think you've answered your own question. How do you know that the last value is in arr[15]? I mean if you're inputting the array yourself, you would have made a point till which you're inputting, that point will be your last index.

Code:

int arr[30],i,n;
scanf("%d",&n);
for(i=0;i<n;i++)
scanf("%d",&arr[i]);

Ofcourse actually the last element can be stored till arr[29], but it could be less than it also.