I Want To Print 1 to 100 Numbers Using Arrays In Javascript Only

Question

<!DOCTYPE html>
<html>
<head>
    <title>100-Numbers</title>
</head>
<body>
    <script>
        var points = new Array(100);
        var label = points.length;
        for (var i = 0; i < label; i++) {
            console.log(points[i]);
        }
    </script>
</body>
</html>

This is my First question in Stackoverflow. As i am an beginner, Please bare me and i need alot of support from you people. I m trying to print 1 to 100 numbers using arrays in javascript only. I'm Facing some errors in the above code. Please correct my mistakes to get the output..Thankyou in advance.

points is an empty array/collection. so accessing it will give undefined values. change console.log(points[i]); to console.log(i); — rajuGT
– rajuGT, Commented Nov 5, 2015 at 12:51
If you change it to console.log(i), you are no longer using arrays. You might as well change label to 100, and remove points altogether. This is not a very well phrased question as it does not indicate HOW you are to use arrays. — ergonaut
– ergonaut, Commented Nov 5, 2015 at 12:56
If you change it to console.log(i), you are no longer using arrays - you'll also get 0 to 99 instead of the required 1 to 100 — Jaromanda X
– Jaromanda X, Commented Nov 5, 2015 at 12:58
@ManojKarthik try to upvote questions that helped you. You can only "accept" one question, but you should still upvote other questions that helped you. That way if someone else stumbles across this thread in the future, it's easy to figure out which answers helped the most people. Welcome - and best of luck on this forum! — Stan Shaw
– Stan Shaw, Commented Nov 5, 2015 at 13:10

Nevin Paul · Accepted Answer · 2018-12-20 02:59:44Z

6

This will print 1-100 without any loops

 Array.from({length: 100},(_,x) => console.log(x+1))

answered Dec 20, 2018 at 2:59

Nevin Paul

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Comments

Stan Shaw · Accepted Answer · 2015-11-05 12:59:14Z

4

he said he wants to print 1-100 from an ARRAY...So the array needs to be populated, first. THEN, you can loop through the array.

        var points = new Array(100);
        for (var i = 0; i < 100; i++) {
            points[i] = i + 1; //This populates the array.  +1 is necessary because arrays are 0 index based and you want to store 1-100 in it, NOT 0-99.
        }

        for (var i = 0; i < points.length; i++) {
            console.log(points[i]); //This prints the values that you stored in the array
        }

answered Nov 5, 2015 at 12:59

Stan Shaw

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Comments

har777 · Accepted Answer · 2015-11-05 13:04:34Z

4

The array values are uninitialized. I'm assuming that you want to print the values 1 to 100 using arrays where the values 1 to 100 are inside the array.

First initialize the array.

var oneToHundredArray = [];

Now populate it with values 1 to 100.

for(var value = 1; value <= 100; value++) {
    oneToHundredArray.push(value);
}

Now the contains the values you want. Just loop and print over it now.

for(var index = 0; index < oneToHundredArray.length; index++) {
    console.log(oneToHundredArray[index]);
}

Done :)

answered Nov 5, 2015 at 13:04

har777

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Comments

Alister · Accepted Answer · 2018-08-23 13:21:56Z

2

Array.from(Array(100), (_,i) => console.log(i+1));

The second parameter acts as mapping callback, so you also do this...

 const arr = Array.from(Array(100), (_,i) => i+1);
 for(num of arr) {
     console.log(num);
 }

Reference: Array.from

edited Aug 23, 2018 at 13:21

answered Aug 23, 2018 at 13:16

Alister

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Comments

kpickering · Accepted Answer · 2018-08-23 13:05:02Z

0

You should start off with an empty array, then run a loop for 1-101, I logged the iterator so you can see the values populate, you then need a binding agent to hold the value of the iteration, then you would need to push those values to your empty array.

var numbersArray = [];
   for( var i = 1; i <101; i++){
       console.log(i);
       var numbers = i;
       numbersArray.push(numbers);
   }

After that, you then need to run a loop for the length of the numbersArray to output the individual results.

for(var m=0; m<= numbersArray.length -1; m++){
       console.log(numbersArray[m]);
   }

output console.log logs numbers 1-100 respectively.

answered Aug 23, 2018 at 13:05

kpickering

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Comments

Joe · Accepted Answer · 2019-02-13 10:14:16Z

0

var label = new Array(100);
        for (var i = 0; i < 100; i++) {
            label[i] = i + 1;
        }

        for (var i = 0; i < label.length; i++) {
            console.log(label[i]);
        }

answered Feb 13, 2019 at 10:14

Joe

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1 Comment

MrMaavin Over a year ago

please explain your answere.

Amir Hatam · Accepted Answer · 2021-02-04 19:54:56Z

0

It's much more easier with "while"

var i = 1;
while (i < 100) {
  document.write(i + "<br/>");
  i++;
}

answered Feb 4, 2021 at 19:54

Amir Hatam

1

Comments

Wyck · Accepted Answer · 2022-03-07 18:34:36Z

0

Using a for loop:

function get_array() {
     var arr = [];
     for(var i=1; i<=100; i++) {
           arr.push(i);
     }
     console.log(arr); 
} 

get_array()

edited Mar 7, 2022 at 18:34

Wyck

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answered Mar 1, 2022 at 6:48

karenescabarte

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1 Comment

Community Over a year ago

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