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>

My first question on Stackoverflow is this one. Please bear with me as I am a newbie and could use a lot of your help. I'm attempting to print 1 to 100 numbers in Javascript using arrays. I'm running into some issues with the code above. Please correct my errors so that you can see the result. I apologise in advance.

Tejashwini · Answer 1 · Nov 17, 2022

This will print 1-100 without any loops

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

answered Nov 17, 2022 by Tejashwini
• 3,820 points
edited Mar 5

score 0 · Answer 2 · Nov 22, 2022

let a=Array(100)

for(b=0;b<=a.length ;b++){
console.log(b)
}

you should proceed in this way to print the result.

As i also checked that while trying to index the value inside the console.log undefined is being printed.

So i will try to find out the exact cause of it and if someone knows the exact reason then do let me know.

answered Nov 22, 2022 by HA1

edited Mar 5

score 0 · Answer 3 · Nov 23, 2022

The main issue is this line

var points = new Array(100);

This generates an array with length 100, there are no elements in that array yet. You would want to add these 1-100 numbered elements to the array first such as below. Notice the points.length method has been replaced by the amount of numbers we want to add as the for loop will add each number to the array and print it out each loop over. Instead of declaring Array(100) it is just Array() to make a new empty array. We do not have to declare a size to start with, this differs from languages such as C++ where you need a vector to achieve this result.

Note: .push(x) adds x to the back of the array

var points = new Array(); 

for (var i = 0; i < 100; i++)  { 

     points.push(i+1) 

     console.log(points[i]);

 }

=> 1, 2, 3, 4, 5, 6, 7, ...

answered Nov 23, 2022 by console.

edited Mar 5

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

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