我不明白为什么我会无限循环

Question

I'm in the process of learning this language and I was asked by my teacher to write some code. Checked for all other posts about it and couldn't find the answer and I just don't understand why I'm getting infinite loop since the condition seems clear (to me at least haha): num1 has to be different from num2. The code is supposed to keep making the question in num2 until the user types the same number as num1.

var num1 = Number(prompt("Digite um número"))
console.log("Fight!")
arrayFinal = []
var num2 = Number(prompt("Que número o jogador 1 escolheu?"))

for (num1; num2 !== num1; num2) {
    arrayFinal.push(num2)
    console.log("O número chutado foi: ", num2)
    if (num2 > num1) {
        console.log("MISS! O número é menor!")
    } else if (num2 < num1) {
        console.log("MISS! O númenor é maior!")
    }
}
console.log("GAME OVER! O jogador 2 venceu! O número de tentativas foi: " +
    (arrayFinal.lenght + 1))

Answer 1

您想多次询问用户num2 ，因此它的prompt应该在循环中。

Answer 2

Your loop starts at num1 . It also says that it will continue looping as long as num2 !== num1 . But at the end of line 6, you just simply put num2 , which does nothing to change num1. So, as long as num1 was previously unequal to num2 , it will always be unequal to num2 and thus make the loop infinite.

You can declare num2 as null outside the loop, then do the prompting inside the loop. That way, when num2 equals num1 , num2 !== num1 returns false , and the loop will stop looping after that iteration. Otherwise, it will continue looping and prompting again and again... until the user inputs the same number as num1 , then it will stop looping after the current iteration.

Also, Take lines 8-13 in the original code out of the loop, so that it does not get repeated as the code prompts repeatedly.

var num1 = Number(prompt("Digite um número"));
console.log("Fight!");
arrayFinal = [];

for (num1; num2 !== num1; num2) {
    var num2 = Number(prompt("Que número o jogador 1 escolheu?")); //dont forget 
    semicolon
    arrayFinal.push(num2);
    console.log("O número chutado foi: ", num2);
    if (num2 > num1) {
        console.log("MISS! O número é menor!");
    } else if (num2 < num1) {
        console.log("MISS! O númenor é maior!");
    }
}
console.log("GAME OVER! O jogador 2 venceu! O número de tentativas foi: " +
    (arrayFinal.length + 1));