Function

Get Help General Programming
#1 
const getUserChoice = userInput => {
  userInput = userInput.toLowerCase();
  if(userInput === 'rock' || userInput === 'paper' || userInput === 'scissors') {
    return userInput;
  } else {
    console.log("Type Rock, Paper or Scissors");
  }
}

//console.log(getUserChoice('Paper'));

const getComputerChoice = () => {
 let number = Math.floor(Math.random()*3);
 //return number;
// console.log(number);
  switch(number) {
    case 0 : return 'rock';
    break;
    case 1 : return 'paper';
    break;
    default : return 'scissors';
    break;
  }
  
} 
console.log(`Computer Choice ${getComputerChoice()}`);

const determineWinner = (userChoice, computerChoice) => {
  if (userChoice === computerChoice){
    return 'Game is tie';
  }else if (userChoice === 'rock' && computerChoice === 'paper') {
    return 'Computer won';
  } else if (userChoice === 'paper' && computerChoice === 'scissors') {
    return 'Computer won';
  } else if (userChoice === 'scissors' && computerChoice === 'rock') {
    return 'Computer won';
  } else {
    return 'User won';
  }
  }
   
  console.log(determineWinner('paper', 'scissors')); 
console.log(determineWinner('paper', 'paper')); 
console.log(determineWinner('paper', 'rock'));
console.log(determineWinner('paper', getComputerChoice()));

Computer Choice rock
Computer won
Game is tie
User won
Game is tie

the last result should User won but it shown user won, why does it happend.

#2

why?

Each time you call getComputerChoice a new random choice is generated. So you have no idea what value getComputerChoice gives back here:

console.log(determineWinner('paper', getComputerChoice()));