Question

public class tester
{
public static void main(String [] args){
int[]gamma=new int[4];
for(int i=0; i<4; i++)
gamma[i] = i+3;
System.out.print(gamma[4]);
}
}


Why is it out of bounds?

Answer 1

At first glance I would say it is because you are printing gama[4] when only 0-3 exist.

Answer 2

arrays use zero based referencing, so if you want the 4th element you'd say gamma[3], if you want the first you'd say gamma[0]

Answer 3

You are asking it to print gamma[4] when it simply doesn't exist!

You created an array of size 4 when you said int[]gamma=new int[4]

This means you created an array that has indexes 0,1,2,3. Index 4 does not exist. If you wanted to print index 4 you would have had to create an array of size 5 ie(int[] gamma= new int[5]

Hope this helps!

Answer 4

The arrays in Java are Zero-Index based, i.e. they start with 0 index and end in [ Total Items - 1 ], So, your case you're getting Out-Of-Bounds error as the gamma[4] is exceeding the last index of your array.