I'm writing a code in Java. I have a question about arrays. I'm trying to shift the values in the array back one by one.
int i;
int[] a = new int[10];
for(i = 0; i < 10; i++)
{ a[i] = i; }
for(i = 9; i > 0; i--)
{ a[i] = a[i - 1]; }
for(i = 0; i < 10; i++) {
System.out.println("a[" + i +"] => " + a[i]);
}
Its output is
a[0] => 0
a[1] => 0
a[2] => 1
a[3] => 2
a[4] => 3
a[5] => 4
a[6] => 5
a[7] => 6
a[8] => 7
a[9] => 8
But I want the output to be like this
a[0] => 9
a[1] => 0
a[2] => 1
a[3] => 2
a[4] => 3
a[5] => 4
a[6] => 5
a[7] => 6
a[8] => 7
a[9] => 8
what is the simplest way to change
a[0] => 0 to a[0] => 9?
Thank you so much for your kindness beforehand.
You should create a variable that's a copy of the last value of the array. Then set it to your first index of the array AFTER your for loop logic.
int lastNumberInArray = a[a.length - 1];
for(i = a.length - 1; i > 0; i--)
{
a[i] = a[i - 1];
}
a[0] = lastNumberInArray;
The simplest method is updating the array using index.
array[0] = <new value>
As per your output, there is no shifting happening.