How to define type in typescript?

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This tutorial is part of the below series.

TypeScript define variable

Let start Part 1: How to define type in typescript?

When we start writing code in typescript, so we have to define also type of every variable to hold any value.

like when storing any integer in a variable.

let num: number = 123;

Now, here we have created the num variable with the number data type.

same from string and other data types also…

let str: string = "shani";
let bool: boolean = true;

Let’s write some variables and check their data type.

let num: number = 123;
let str: string = "123";
let bool: boolean = true;

typeof num;
typeof str;
typeof bool;

TypeScript, Data type example

Next := How to define array in typescript?