Dan Dan - 4 months ago 10
Java Question

How do I fill an array with consecutive numbers

I would like to fill an array using consecutive integers. I have created an array that contains as much indexes as the user enters:

Scanner in = new Scanner(System.in);
int numOfValues = in.nextInt();

int [] array = new int[numOfValues];


How do i fill this array with consecutive numbers starting from 1?
All help is appreciated!!!

Answer

Since Java 8

//                               v end, exclusive
int[] array = IntStream.range(1, numOfValues + 1).toArray();
//                            ^ start, inclusive

The range is in increments of 1. The javadoc is here.

Or use rangeClosed

//                                     v end, inclusive
int[] array = IntStream.rangeClosed(1, numOfValues).toArray();
//                                  ^ start, inclusive
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