Separating while loop output in JavaScript

Question

I currently have this small script that outputs a value after each iteration of a while loop:

var i = 0;
var number = "";

while (i < 10) {
    number += console.log(i);
    i++;
}

Which creates this output:

However, I am testing some API calls and using the while loop in JavaScript to see if I can send values consistently, so my values are coming from the script below:

var i = 0;
var number = "";

while (i < 10) {
    number += (i);
    i++;
}

I do not need console.log() because I do not need the output in the terminal. My issue is when looking at the output on the receiving end when using the API, it looks something like this:

The API calls are in the while loop as well, I did not include them because I feel this is a JavaScript syntax related issue. So what will happen is that the while loop begins, number is iterated, that value is sent to a website using an API call, and the the while loop begins again. Something like the code below:

var i = 0;
var number = "";

while (i < 10) {
    number += (i);

    API_Send(number)

    i++;
}

What can I do to so that the output of each iteration is its own separate variable similar to the output using console.log(), so first iteration is 0, second iteration is 1, and so on.

I feel this is something that would be necessary when outputting values to be used by a function. So perhaps it is best to create a function that has a while loop outputting integer values?

var number = ""; You're concatenating. Initialize number to 0 instead, or reassign number completely — CertainPerformance
– CertainPerformance, Commented Nov 1, 2018 at 7:14
Why you don't use for (i = 0; i < 10; i++) { do something... } it will simple. — son pham
– son pham, Commented Nov 1, 2018 at 7:18

PravinS · Accepted Answer · 2018-11-01 07:35:03Z

3

The problem is that you have declared number as string, don't do that just assign 0 to number variable. Because of string variable javascript is concatenating the numbers.

Change as following:

var i = 0;
var number = 0;

while (i < 10) {
    number += (i);

    console.log(number)

    i++;
}

edited Nov 1, 2018 at 7:35

PravinS

2,5943 gold badges22 silver badges27 bronze badges

answered Nov 1, 2018 at 7:32

PrakashG

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