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

Its not available that true. But you make a static method and use it -

public static int[] range(int index){
    int[] arr = new int[index];
    for(int i=0;i<index;i++){
        arr[i]=i;
    }
    return arr;
}

Answer 2

There's no Java equivalent to the range function, but there is an enhanced for-loop:

for (String s : strings) {
    // Do stuff
}

You could also roll your own range function, if you're really attached to the syntax, but it seems a little silly.

public static int[] range(int length) {
    int[] r = new int[length];
    for (int i = 0; i < length; i++) {
        r[i] = i;
    }
    return r;
}

// ...

String s;
for (int i : range(arrayOfStrings.length)) {
    s = arrayOfStrings[i];
    // Do stuff
}

Answer 3

Um... for (int i = 0; i < k; i++)? You don't have to write enhanced for loops all day, you know, although they are cool...

And just for the sake of argument:

for (int i : range(k)) char count: 22

for (int i = 0; i < k; i++) char count: 27

Discounting the implementation of range, it is pseudo even.