To avoid any inconvenience or potential exchange rate losses, it's advisable to exchange some of your US dollars for Danish krones. You can do this at banks, currency exchange offices, or ATMs in Denmark. Some international credit or debit cards may also allow you to make payments and withdraw cash in local currency, but it's always a good idea to check with your bank about any associated fees or charges.
By having Danish krones on hand, you'll be able to make purchases and pay for goods and services more conveniently during your time in the country.