Function is not running as expected [duplicate]

I am a total novice with zero background in computer coding, teaching myself how to write code. I would be so grateful if someone who actually knows what they're doing would please be able to explain why my code below isn't working? Don't give me the solution, please. I want to know the reason why it's not doing what I expect it to do. Thank you so much in advance!
function getComputerChoice() {
return rock || paper || scissors, Math.floor(Math.random() * 3);
let rock = 0
let paper = 1
let scissors = 2
if (0) {
return "rock"
} else if (1) {
return "paper"
} else {
return "scissors"
}
}



I tried what I included above and I expected the log to bring up either rock, paper, or scissors but it's only bringing up the random number! I tried moving the variables to the beginning of the code but that made no difference in the results.