How the output is coming 10 and 40? Please explain.

Question

public class Test
{
public static void methodOne(int[]... x)
{
for(int[] a:x)
{
System.out.println(a[0]);
}
}

public static void main(String[] args) {
int[] l={10,20,30};
int[] m={40,50};
methodOne(l,m);
}
}

// Output - 10 40

Answer 1

The use of the variadic parameter (...) will result in the arguments being placed into an array like structure themselves. So, when the arrays l and m are passed you end up with a 2d array like;
{{10,20,30}, {40,50}}
Then the loop will loop through each of the nested arrays and output the element in the 0th position. Hence, 10 and 40.

Answer 2

ChaoticDawg , it'll 2d array....

What if, I'll give more like
int[] x={3,4,5,6}
int[] x={1,6,3,7,3}
int[] x={56,76,1,7,9}

Then, it'll return all arrays 0th index value?

Answer 3

Minhaj Haider(MiDer)
Yes, it should, try it and see

Answer 4

ChaoticDawg okay thanks 😊