Digits the other way round

Problem

Write a function that takes a two-digit number (from 10 to 99) and returns the number you get by swapping its digits: 47 becomes 74. What you return is a number, not a text.

If the number ends in 0, the one that comes back has a single digit: 50 becomes 5.

Examples

• 47 → 74

• 12 → 21

• 99 → 99

Besides these, the challenge has hidden tests that are revealed when you submit your solution.

You start with this

def flip_digits(n):
    pass

function flipDigits(n) {
}