JavaScript Program to Check if An Object is An Array

// program to check if an object is an array

function checkObject(arr) {

    // check if arr is array
    const result = Array.isArray(arr);

    if(result) {
        console.log(`[${arr}] is an array.`);
    }
    else {
        console.log(`${arr} is not an array.`);
    }

}

const array = [1, 2, 3];

// call the function
checkObject(array);

Output

[1,2,3] is an array.