如何使用 for 循环创建数组并分配线性值？

Question

I want to create an array and using a for loop and I want to assign values with an increment of 1o. So far here is what I have and I am not getting the result I want...

public class ArrayDemo1 {

    public static void main(String[] args) {

        int array[] = new int[10];
        System.out.println("The array elements are: ");

        for (int i = 0; i <= array.length - 1; i++) { // Controls index...
            for (int j = 0; j < 101; j += 10) { // Controls value of each array index...
                array[i] = j;
                System.out.println(array[i]);

            }
        }

    }

}

Here is my output [Stack overflow won't let me have the whole output so here is the shortened version; This output (starting at /* and ending at */) was repeated 10 full times. It printed from 0 to 100 ten times with an increment of 10]:

The array elements are:
   /*
    0
    10
    20
    30
    40
    50
    60
    70
    80
    90
    100
    */
    Process finished with exit code 0

Here is what I want. For every index, I want one value and the next value should be an increment of 1o:

The array elements are:
    0
    10
    20
    30
    40
    50
    60
    70
    80
    90

Answer 1

You don't need a nested for loop to assign values into a single array.

Populate each index by i*10 rather than introduce j .

You should also print the array in a new loop, otherwise, there's not much purpose for keeping the array and printing it in the same location

And rather than <= array.length - 1 , you'll want < array.length

You can also use an IntStream , which is the modern way to achieve the same result

Answer 2

You don't need a nested loop - the value is always the index multiplied by 10:

for (int i = 0; i <= array.length - 1; i++) {
     array[i] = i * 10;
}

EDIT:
If you don't have to use loops, this could arguably be done more elegantly with a stream:

int[] array = IntStream.range(0, 10).map(i -> i * 10).toArray();