Sanjeewa Blog

 JavaScript Primitive Data Types Why JS Loosely typed and Dynamic language? In JavaScript variable not directly associated with any value type and can be assigned and re assigned values of all types.  example           let item = 2;           item= 'bag';           item = true; Primitive Data Types "A Primitive is data that is not object and has no methods." string number bigint boolean undefined symbol null All primitives are immutable( can be replace but cannot directly alter ) variable can be re assign to new value but existing value can not change in the way objects, arrays and functions altered . example / /string methods doesn't mutate string var name = "JHON" console.log(name) // JHON name.toLowerCase(); console.log(name) // JHON   //array methods mutate the array var myArray = [] console.log(myArray); // [] myArray.push("car") console.log(myArray); // ["car"]   //asignment assign primitive a new value but not a mutated value n