java array sum ....query

Question

i was programming in java and i found the following 2 codes give the same output:
why?
class Myclass{
public static void main(String[] args){
int [] myarr={1,2,3,4,5,6,7,8,9,10};
int sum=0;
for(int x=0;x<myarr.length;x++){
sum+=myarr[x];
} System.out.println(sum);
}
}

class Myclass{
public static void main(String[] args){
int [] myarr={1,2,3,4,5,6,7,8,9,10};
int sum=0;
for(int x=0;x<=myarr.length;x++){
sum+=x;

Answer 1

https://www.sololearn.com/Codes/

^Post your codes there and link us. Posts in the 'Discuss' area is limited by a certain amount of characters, which is why your post got cut off half-way through.

However, to answer your question, it appears that it's because you're adding together the exact same numbers. In your array, it's 1-10 that's being added together. In your loop, x is iterating from 0-10 and adding the numbers together, which is the exact same numbers as 1-10. That's why you get same output; coincidence that it's the same numbers. Change one number in the array and it won't be the same.

Answer 2

on the first class:

sum = sum + myarr[x]
1 = 0 + myarr[0]
3 = 1 + myarr[1]
6 = 3 + myarr[2]
...and so on

on the secon class:
sum = sum + x
1 = 0 + 1
3 = 1 + 2
6 = 3 + 3
and so on...

Answer 3

thanks for letting me know !