JSFiddle - React, Tailwind, and code Playground
JavaScript
var age = 23;
var arr=["John",age, age+=10, age--, age-1, undefined]
console.log(arr)
arr.length=2;
console.log(arr)
delete arr[3]
console.log(arr.length)
delete arr[0]
console.log(arr)
console.log(arr.length)
arr[6]="Sam"
console.log(age)