Javascript concatenate strings in array

Question

Why does the following code not work? Can't figure it out.

            var string = "";
            for (var x; x < numbersArray.length; x++)
                string += numbersArray[x];
            alert(string);

string is empty at the end.

Also having variable names like "string" is considered bad practice. Btw. you could also use numbersArray.join(""). — LJᛃ
– LJᛃ, Commented Sep 28, 2014 at 2:06

SLaks · Accepted Answer · 2014-09-28 02:04:34Z

4

x is undefined, which is not less than any number. Therefore, your terminating condition is always false.

You probably want to start at 0.

answered Sep 28, 2014 at 2:04

SLaks

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Comments

hasanain · Accepted Answer · 2014-09-28 02:08:40Z

2

        var string = "";
        for (var x=0; x < numbersArray.length; x++)
            string += numbersArray[x];
        console.log(string);

Just make sure to initialize your x.

answered Sep 28, 2014 at 2:08

hasanain

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