Advanced Random Number Generator Challenge Solution

//Variables to use
let
name,
greeting,
yesNo,
numb1,
entNumb,
numb2,
randNumb,
message,
playAgain;

function startGame() {
//Welcomes user and prompts for input
name = prompt("Hey there! What's your name?");
greeting = prompt("Nice to meet you " + name + " ! Would you like to play a game?");

//Loop prompts only Yes or No answer
while (greeting.toUpperCase() !== "YES" && greeting.toUpperCase() !== "NO") {
    yesNo = prompt("I'm sorry. Please enter either 'yes' or 'no' to continue.");
    greeting = yesNo;
}

//Conditional based on Yes or No answer
if (greeting.toUpperCase() === "YES") {
  alert("Great! I'm going to ask your to enter two numbers. Press OK to continue");
} else if (greeting.toUpperCase() === "NO") {
  alert("Okay " + name + ", that's fine. Simply refresh this screen if you change your mind. Goodbye!");
}

//Collects numbers for random generation
numb1 = parseInt(Math.round(prompt("Please enter any number between 0 and 50.")));
while (isNaN(numb1) || numb1 < 0 || numb1 > 50) {
  entNumb = prompt("I'm sorry. Please enter a number between 0 and 50.")
  numb1=entNumb;
}
numb2 = parseInt(Math.round(prompt("Great! Now enter any number between 51 and 100.")));
while (isNaN(numb2) || numb2 < 51 || numb2 > 100) {
  entNumb = prompt("I'm sorry. Please enter a number between 51 and 100.")
  numb2=entNumb;
}

//Generates random number between first and second selected numbers
alert("Great! Now we're going to generate a random number between " + parseInt(numb1) + " and " + parseInt(numb2) + "! Press OK to continue.")

randNumb = Math.floor(Math.random() * (numb2 - numb1 + 1)) + numb1;
message = "Your random number between " + numb1 + " and " + numb2 + " is " + randNumb + "!";
alert(message);

//Creates button for playing game again
//Calls <div> element with id="start" from index.html
document.getElementById("start").innerHTML = `
<h1>Let's do that again!</h1>
<div>
  <button onclick="startGame()">Play Again</button>
</div>
`;
}

//Creates button for starting game
//Calls <div> element with id="start" from index.html
document.getElementById("start").innerHTML = `
<h1>Let's get this party started!</h1>
<div>
  <button onclick="startGame()">Start Game</button>
</div>
`;