JavaScript: Generate an array between two integers of 1 step length

Last update on May 30 2022 10:01:15 (UTC/GMT +8 hours)

JavaScript Array: Exercise-41 with Solution

Write a JavaScript function to generate an array between two integers of 1 step length.

Test Data :
console.log(rangeBetwee(4, 7));
[4, 5, 6, 7]
console.log(rangeBetwee(-4, 7));
[-4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7]

Pictorial Presentation:

JavaScript: Generate an array between two integers of 1 step length

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to generate an array between two integers of 1 step length</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function rangeBetwee(start, end) 
{
  
		if (start > end) {
			var arr = new Array(start - end + 1);
			for (var i = 0; i < arr.length; i++, start--) {
				resarrult[i] = start;
			}
			return arr;
		} 
       else 
       {
			var arro = new Array(end-start+1);
         
		for (var j = 0; j < arro.length; j++, start++) 
        {
			arro[j] = start;
		}
      		return arro;
		}
	}

console.log(rangeBetwee(4, 7));
console.log(rangeBetwee(-4, 7));

Sample Output:

[4,5,6,7]
[-4,-3,-2,-1,0,1,2,3,4,5,6,7]

Flowchart:

ES6 Version:

function rangeBetwee(start, end) 
{
  
		if (start > end) {
			const arr = new Array(start - end + 1);
			for (let i = 0; i < arr.length; i++, start--) {
				resarrult[i] = start;
			}
			return arr;
		} 
       else 
       {
			const arro = new Array(end-start+1);
         
		for (let j = 0; j < arro.length; j++, start++) 
        {
			arro[j] = start;
		}
      		return arro;
		}
	}

console.log(rangeBetwee(4, 7));
console.log(rangeBetwee(-4, 7));

Live Demo :

See the Pen JavaScript -Generate an array between two integers of 1 step length-array-ex- 41 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript function to find the unique elements from two arrays.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04