I've heard that the word "damn" and "darn" have a similar meaning. Then, is "darn" a swear word as well?

Native speaker’s answer
Rebecca
Many people don't consider "darn" a swear word, but I'm sure some do! You can replace "damn" with "darn" as it is less harsh. Which is also why it's in a kid's show! Ex: Darn it. I missed my train. = Damn it. I missed my train.