An array is collection of items.An array can hold many values under a single name, and you can access the values by referring to an index number.
for example lets consider an array 'names'
let names = ['billu','maaru','mayank','mayur','tillu',];
Array Methods:
console.log(names);
//length
console.log(names.length);
//specific element
console.log(names[2]);
//last element
console.log(names[names.length-1]);
replacing an element
names[2] = 'shanaya';
console.log(names);
//inserting new value
names.push('ram');
console.log(names);
//accesing multiple values through slice
console.log(names.slice(1,4));
//splice
let fruit = ['apple','banana','orange','watermelon']; fruit.splice(2,2,'grapes','chiku');
console.log(fruit);
//concatenation
let arr1 = [1,2,3,4,5,7,8] let arr2 = [5,6,7,8] let arr3 = [9,10] console.log(arr1.concat(arr2,arr3));
//fill
console.log(arr1.fill('mayur',2,5));
//includes
console.log(arr1.includes(5,7));