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How to define type in typescript?

Infinitbility
TypeScript
March 26th, 2022 · 1 min read
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This tutorial is part of the below series.

TypeScript define variable

  1. How to define type in typescript?
  2. How to define array in typescript?
  3. How to define object in typescript?
  4. How to define array of objects in typescript?

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.

1let num: number = 123;

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

same from string and other data types also…

1let str: string = "shani";
2let bool: boolean = true;

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

1let num: number = 123;
2let str: string = "123";
3let bool: boolean = true;
4
5typeof num;
6typeof str;
7typeof bool;

Output

TypeScript, Data type example
TypeScript, Data type example

Next := How to define array in typescript?

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