Question

I have an array variable like Array[0], and now I need to check whether that Array[0] contains value or not inside of it. What should I do?

Answer 1

If you have an array and call it eg. list, then you can check if it has some elements in the following manner:

if (list.length){
    // has some elements (exactly list.length elements)
} else {
    // does not have any elements
}

See the following for details: Documentation on length property of Array objects in JavaScript