How to shuffle digits inside a number?

Question

Python

A=1234
and for example there should be 24 different numbers,
1243
1342
1324
etc

Answer 1

itertools.permutations

Answer 2

I can assume that you were given the task to do it manually, if so, then the algorithm will be something like this in the simplest version for Java.
1) Convert number to string. Integer.toString();
2) Parse the resulting string into an array. "string".toCharArray();
3) Interfere with the array.
4) Translate the array back into a string String.valueOf("array")
5) Translate the string back into a number. Integer.parseInt("string");