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JavaScript Introducing the Practice

Posted by Hanna Reed
Hanna Reed
3,849 Points

While loops

What am I doing wrong here?

```let i; let text;

// 1. Write a while loop to build a string of numbers from 0 to 4, // separated by spaces, and store the string in the variable text. print('1st Loop:'); text = '';

// Write 1st loop here:

while (i <= 4) { i++; text += i + ' '; }```

2 Answers

Joe Beltramo
Joe Beltramo
Courses Plus Student 22,191 Points

You need to assign a value to your initial i variable

let i = 0 // Sets the variable to equal 0 as a number so that it may be incremented
let text = '' // Sets the variable as a string

while (i <= 4) {
    i += 1 // Increments the variable
    text += i // adds the number to a string (which results in a string)
}

(You really are only missing the initial assignment for the variable i)

Hanna Reed
Hanna Reed
3,849 Points

thank you, I thought I tried this but I suppose not

Phil Sta
Phil Sta
3,805 Points
Phil Sta
Phil Sta
3,805 Points

Hi Joe,

I am stuck with this one too... what if the counting starts with 1 and not 0 (or counts down from 50 to 0) ... what value do you assign to the initial variable i?

Alicea Hotchkiss
Alicea Hotchkiss
5,956 Points
Alicea Hotchkiss
Alicea Hotchkiss
5,956 Points

I know this is way old, but hopefully it may help anyone else struggling with this. There are two ways I know of to do this:

1 - initialize the variable at which number you want the count to start. So if you want your count to start at 1, it would be:

let i = 1 or var i = 1

The output in that case for this program would be: 1 2 3 4

2 - increment the count before adding it to the counter. That would look like this:

var i = 0;

while ( i <= 4 ) { i += 1 ; text += (i + " "); }

Following the code shows that as long as the variable i is less than or equal to 4, the program will increase the variable by 1 and then add it to the text string. This will also result in the output of 1 2 3 4.

Hope that helps!