For loop - like Python range function

Question

I was wondering if in Java there is a function like the python range function.

range(4)

and it would return

[0,1,2,3]
         


        

Answer 1

If you really, really want to obtain an equivalent result in Java, you'll have to do some more work:

public int[] range(int start, int end, int step) {
    int n = (int) Math.ceil((end-start)/(double)step);
    int[] arange = new int[n];
    for (int i = 0; i < n; i++)
        arange[i] = i*step+start;
    return arange;
}

Now range(0, 4, 1) will return the expected value, just like Python: [0, 1, 2, 3]. Sadly there isn't a simpler way in Java, it's not a very expressive language, like Python.