How do you nest if statement in do-while loop in 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)

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

I have a question for you! If you are asking the user for a prompt, you shouldn't be using a while loop because, that will make your loop go on forever. — ARLCode
– ARLCode, Commented Jun 26, 2015 at 4:38
I see. Sorry for my ignorance. I just want to see how to implement it...sooner or later i will realize by myself the letting user prompt the code was a mistake. =\ thank you for your advise! — Hang Li
– Hang Li, Commented Jun 26, 2015 at 4:40

score 2 · Accepted Answer · 2015-06-26 05:23:03Z

2

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);

edited Jun 26, 2015 at 5:23

answered Jun 26, 2015 at 4:25

user2575725

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2 Comments

Hang Li Over a year ago

Thank you! now is there a way to only display one temp Prompt(ing) the user temperature?

Hang Li Over a year ago

thank you for your hastily update! Is there a way to only control.log the prompt temp?

ARLCode · Accepted Answer · 2015-06-26 04:33:19Z

1

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. :)

answered Jun 26, 2015 at 4:33

ARLCode

6516 silver badges20 bronze badges

6 Comments

Hang Li Over a year ago

thank you so much for your detailed explanation! if there a way to revise the code that only display the console.log of the specified temp the user put in?

ARLCode Over a year ago

Yeah just output the users input. var sample = prompt("Input Temp"); Then print out the users input like this, console.log(sample);

ARLCode Over a year ago

Make sure to mark this as the answer, it helps me out and others! :)

ARLCode Over a year ago

What exactly are you trying to do? That way I can write out a code that is specific to what you are trying to do.

Hang Li Over a year ago

I wanted to console.log one or the other of the if statement. however, it displaying all the iterations of console.log. then I realize it is suppose to show since it did in a loop function. Problem solved thank you for your time!

|

Mukesh Kalgude · Accepted Answer · 2015-06-26 04:27:20Z

1

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)

answered Jun 26, 2015 at 4:27

Mukesh Kalgude

4,8542 gold badges20 silver badges32 bronze badges

1 Comment

Hang Li Over a year ago

Thank you! now is there a way to only display one temp Prompt(ing) the user temperature?

Kainix · Accepted Answer · 2015-06-26 04:29:01Z

1

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);

answered Jun 26, 2015 at 4:29

Kainix

1,2143 gold badges23 silver badges36 bronze badges

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