# Can array form consecutive sequence - JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

We are required to write a JavaScript function that takes in an array of numbers and checks if the elements of the array can be rearranged to form a sequence of numbers or not.

For example −

If the array is −

const arr = [3, 1, 4, 2, 5];

Then the output should be −

true

## Example

Following is the code −

const arr = [3, 1, 4, 2, 5];
const canBeConsecutive = (arr = []) => {
if(!arr.length){
return false;
};
const copy = arr.slice();
copy.sort((a, b) => a - b);
for(let i = copy[0], j = 0; j < copy.length; i++, j++){
if(copy[j] === i){
continue;
};
return false;
};
return true;
};
console.log(canBeConsecutive(arr));

## Output

Following is the output in the console −

true
Published on 16-Sep-2020 13:54:28