如何在JavaScript的do-while循环中嵌套if语句

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) 

Please review my snippet. It won't run for some reason stating some bracket error as I already checked the brackets.

Answer 1

Its do not for

 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); 

You may use prompt() for user input:

 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); 

Answer 2

Replace for with do. like this

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

It should be

 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

The do while loop syntax is like this:

Example

do {

}while(conditions);

So a do-while loop with a nested if/else statement is like this:

do-while w/ nested if/else

do{

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

Example w/ YOUR CODE

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);

Okay now, let me explain what is happening here. What you are essentially doing is telling the compiler to do something until the while loop returns true. So, if you notice I changed temp -= 1; to temp--; it is exactly the samething it's just much more standard to use the latter. You were actually very close with your original code other than it is a do-while loop not a for-while. :)