JavaScript only including every even number in an array

Question

I want to ask the user a series of questions (this is only for college hence the prompt's and not a proper UI), and to cut down on the LOC I added all the questions to an array called !questions"

For some reason the loop is only including every even number in the array.

The code I am using is below

    var questions = ['How old is Mark Zuckerberg?',
                     'How much is he worth?',
                     'How old is Bill Gates?',
                     'How much is he worth?',
                     'How old is Dennis Ritchie?'];

    for (var i = 0; i < 6; i++)
    {
        prompt(questions[i++]);
    }

If anyone could help me to get it prompting every question from the array I would very much appreciate this.

You are incrementing i twice in each loop iteration.

Jon
– Jon

2014-02-11 14:27:26 +00:00
Commented Feb 11, 2014 at 14:27 — Jon
– Jon, Commented Feb 11, 2014 at 14:27

Peter Bratton · Accepted Answer · 2014-02-11 16:29:27Z

5

You're incrementing i twice each time the loop iterates.

Try:

for (var i = 0; i < 6; i++)
{
    prompt(questions[i]);
}

Or:

for (var i = 0; i < 6; )
{
    prompt(questions[i++]);
}

Either will increment i once per loop iteration.

edited Feb 11, 2014 at 16:29

answered Feb 11, 2014 at 14:27

Peter Bratton

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Comments

user1983983 · Accepted Answer · 2014-02-11 14:27:55Z

4

Use

prompt(questions[i]);

Instead of

prompt(questions[i++]);

answered Feb 11, 2014 at 14:27

user1983983

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Comments

Netzach · Accepted Answer · 2014-02-11 14:34:14Z

1

your error is that u put i++, u should only put i, increases so does the loop

for (var i = 0; i < 6; i++)
    {
        prompt(questions[i]);
    }

answered Feb 11, 2014 at 14:34

Netzach

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