<h2 id="heading-typescript">TypeScript</h2>
<ul>
<li>It is a type safe language. it exists for : </li>
</ul>
<ol>
<li>having less bugs 🐞</li>
<li>minimising runtime error ⌛️</li>
<li>more productive ⌚️</li>
</ol>
<h3 id="heading-what-is-runtime">what is <code>runtime</code>?</h3>
<blockquote>
<p><strong>Definition</strong></p>
<p>Runtime is a system used primarily in software development to describe the period of time during which a program is running.</p>
</blockquote>
<p>[SP//] : <a href="https://www.stackpath.com/edge-academy/what-is-runtime/" class="autolinkedURL autolinkedURL-url" target="_blank">stackpath.com/edge-academy/what-is-runtime</a> "What is runtime?"</p>
<h3 id="heading-ok-then-what-is-runtime-error">ok, then, what is <code>runtime error</code>?</h3>
<blockquote>
<p>Runtime error refers to an error that takes place while executing a program. To put it simply, an error that happens while the code runs.</p>
</blockquote>
<h3 id="heading-javascript-doesnt-support-strongly-typed-or-static-typing-as-typed-below">JavaScript doesn't support strongly typed or static typing as typed below.</h3>
<pre><code>[<span class="hljs-number">1</span>,<span class="hljs-number">2</span>,<span class="hljs-number">3</span>] + <span class="hljs-literal">true</span>
<span class="hljs-comment">// result 1,2,3true</span>
</code></pre><h3 id="heading-what-is-typescript-compiled-to">What is Typescript compiled to?</h3>
<ul>
<li>JavaScript Code. TypeScript needed to be translated to JavaScript to be run.</li>
</ul>
<h3 id="heading-typescript-can-infer-it-sometimes">Typescript can infer it sometimes</h3>
<blockquote>
<p>We don't have to specify a type for our variables in Typescript since TypeScript can infer.</p>
</blockquote>
<h3 id="heading-how-do-we-set-the-type-of-a-variable-explicitly-in-ts">How do we set the type of a variable explicitly in TS?</h3>
<pre><code><span class="hljs-keyword">const</span> x : string = <span class="hljs-string">"hi"</span>
</code></pre><h3 id="heading-how-to-declare-as-an-array">how to declare as an array</h3>
<pre><code><span class="hljs-keyword">let</span> a : number[] = [<span class="hljs-number">1</span>];
<span class="hljs-keyword">let</span> b : string[] = <span class="hljs-string">"i1"</span>;
<span class="hljs-keyword">let</span> c : boolean[] = [<span class="hljs-literal">true</span>];
</code></pre><h3 id="heading-ia"> </h3>


## TypeScript 
- It is a type safe language. it exists for : 


1. having less bugs 🐞
2. minimising runtime error ⌛️
3. more productive ⌚️

### what is `runtime`?

> **Definition**

> Runtime is a system used primarily in software development to describe the period of time during which a program is running.

[SP//] : https://www.stackpath.com/edge-academy/what-is-runtime/ "What is runtime?"

### ok, then, what is `runtime error`?
> Runtime error refers to an error that takes place while executing a program. To put it simply, an error that happens while the code runs.

### JavaScript doesn't support strongly typed or static typing as typed below.

```
[1,2,3] + true
// result 1,2,3true
```

### What is Typescript compiled to?

 - JavaScript Code. TypeScript needed to be translated to JavaScript to be run.

### Typescript can infer it sometimes
> We don't have to specify a type for our variables in Typescript since TypeScript can infer.

### How do we set the type of a variable explicitly in TS?

```
const x : string = "hi"
```

### how to declare as an array
```
let a : number[] = [1];
let b : string[] = "i1";
let c : boolean[] = [true];
``` 

###  

[TypeScript] Basics

Create Blockchain with Typescript : From #1.5 to #2.1 (Nomad Coder)

TypeScript

what is `runtime`?

ok, then, what is `runtime error`?

JavaScript doesn't support strongly typed or static typing as typed below.

What is Typescript compiled to?

Typescript can infer it sometimes

How do we set the type of a variable explicitly in TS?

how to declare as an array