JSFiddle - React, Tailwind, and code Playground

JavaScript

var randomNumber = getRandomNumber(10);
var guess; 
var guessCount = 0;
var correctGuess = false;

function getRandomNumber(upper) { 
    var num = Math.floor(Math.random() * upper) + 1;
    console.log ("Number is " + num + ".");
    return num;
}

do {
        guess = prompt("I am thinking of a number between 1 and 10. Can you guess the number?The number is " + randomNumber + ".");
    guessCount += 1;
    if (parseInt(guess) === randomNumber){
        correctGuess = true;
    }
} while (!correctGuess);

alert('You guessed the number!');
alert('It took you ' + guessCount + ' tries to guess the number ' + randomNumber);