Joining Digits Together

Create a function which takes in a number n as input and returns all numbers up to and including n joined together in a string. Separate each digit from each other with the character "-".

Examples

joinDigits(4) ➞ "1-2-3-4"

joinDigits(11) ➞ "1-2-3-4-5-6-7-8-9-1-0-1-1"

joinDigits(15) ➞ "1-2-3-4-5-6-7-8-9-1-0-1-1-1-2-1-3-1-4-1-5"

Notes

Remember to start at 1 and include n as the last number.