TypeScript Hindi Tutorial #14 Any and unknown Data Type

Any Data Type

Which allows a variable to hold values of any type.

If you are not sure about data type of variable you can use any

When migrating JavaScript code to TypeScript.

When dealing with dynamic values from APIs.

When working with third-party libraries that lack type definitions.

The unknown type in TypeScript is similar to any, but it's safer

because it forces type checking before performing operations on the value.

any_unknown.ts

var value:any ="Anil";

value=100

value=['anil'];

value=true;

value={}

var value1:unknown ="anil";

value1=100;

value1=['anil'];

value1={};

value1="Anil sidhu"

if(typeof value1=='string'){

console.log(value1.toUpperCase());

}

any_unknown.js

"use strict";

var value = "Anil";

value = 100;

value = ['anil'];

value = true;

value = {};

var value1 = "anil";

value1 = 100;

value1 = ['anil'];

value1 = {};

value1 = "Anil sidhu";

if (typeof value1 == 'string') {

console.log(value1.toUpperCase());

}