How to bring the values of an array from another array using the data of a variable as an index?

Actually I would just like to know if there is a way to use the value of a variable as an index of an array. It would be great if you could give an example of how to do this. Thanks.

Thank you very much!!!

Hi

I have one more question on this same subject.

Could I invert the values, for example, of positions 2 and 3, directly in the array or would I have to use a second array to determine the position where each of the values that I will be bringing from the first array will be stored?

Would it not be better to just modify the string that already determines the array index?

For example your current string is 4231 and if you want to invert positions 2 and 3 you would change the string to 4321?