JavaScript Array

        let arr = [21,68,78,99,89]
        let names = ["prasad","sahil","rahul","jay","vivek"]

        console.log(names)

        // add
        names.push("kaustubh")
        names.unshift("pritesh")
        names.splice(2,0,"sarthak")
        console.log(names)

        // remove 
        names.pop()
        names.shift()
        names.splice(1,1)
        console.log(names)

        // update 
        names[0] = "kartik"

        console.log(names)
  

Console Output