如何在javascript

Question

var temp = 110;
for {
    temp-=1
    if (temp >= 90) {
        console.log("Today's temperature is "+temp+"! "+"Lets go play ball")
    } else {
        console.log("Today's temperature is "+temp+"! "+"It is too hot today to ball!")
    }
    
}while (temp > 90)

请查看我的代码段。因为我已经检查了括号，它不会因某种原因说明某些括号错误。

Answer 1

其do而非for

＆＃13;

＆＃13;

var temp = 110;
do { //its `do` not `for`
  temp -= 1;
  if (temp >= 90) {
    console.log("Today's temperature is " + temp + "! " + "Lets go play ball")
  } else {
    console.log("Today's temperature is " + temp + "! " + "It is too hot today to ball!")
  }

} while (temp > 90);

＆＃13;

＆＃13;

＆＃13;

您可以使用prompt()进行用户输入：

＆＃13;

＆＃13;

var temp = prompt('Input temperature', '110'); // (message, default input)
console.log('temp', temp);
do { //its `do` not `for`
  temp -= 1;
  if (temp >= 90) {
    console.log("Today's temperature is " + temp + "! " + "Lets go play ball")
  } else {
    console.log("Today's temperature is " + temp + "! " + "It is too hot today to ball!")
  }

} while (temp > 90);

＆＃13;

＆＃13;

＆＃13;

Answer 2

替换为do。像这样

var temp = 110;
do{
    temp-=1
    if (temp >= 90) {
        console.log("Today's temperature is "+temp+"! "+"Lets go play ball")
    } else {
        console.log("Today's temperature is "+temp+"! "+"It is too hot today to ball!")
    }

}while (temp > 90)

Answer 3

应该是

var temp = 110;
do {
    temp-=1
    if (temp >= 90) {
        console.log("Today's temperature is "+temp+"! "+"Lets go play ball")
    } else {
        console.log("Today's temperature is "+temp+"! "+"It is too hot today to ball!")
    }
    
}while (temp > 90);

Answer 4

do while循环语法如下：

示例

do {

}while(conditions);

所以带有嵌套if / else语句的do-while循环是这样的：

do-while w / nested if / else

do{

if() {
}
else {
}
}while();

您的代码示例

var temp = 110;

do {
 if(temp >= 90) 
{
    console.log("Today's temperature is "+temp+"! "+"Lets go play ball");
{
else 
{
    console.log("Today's temperature is "+temp+"! "+"It is too hot today to play      ball!");
}
 temp--; 
} while(temp > 90);

好的，现在让我解释一下这里发生了什么。你基本上做的是告诉编译器做什么，直到while循环返回true。所以，如果你注意到我改变了temp -= 1; to temp--;，那么使用后者就更加标准了。你实际上与你的原始代码非常接近，除了它是一个do-while循环而不是for-while。 ：）