function sample(name,...rest){   //...variable --> indicates rest operator
    console.log(name);
    console.log(rest);
}
sample('Praveen',521,'praveen8642kumar@gmail.com','8688574614');

var a = [1,2,3];
var b = [6,7,8];
var c = [...a,...b];   //[...var1,...var2,............] indicates spread operator
console.log(c)