Functions are the heart of any programming language, and in TypeScript, they become even more powerful with type safety.

In my latest video, I walk you through how to write and use functions in TypeScript. Whether you're transitioning from JavaScript or just getting started with TS, this tutorial is designed to help you build a solid foundation.

📺 Watch the full tutorial on YouTube:

🚀 What You'll Learn:

✅ Declaring functions with TypeScript

✅ Arrow functions vs traditional functions

✅ Typing function parameters and return values

✅ Optional and default parameters

✅ Clean code and best practices

🔧 Why TypeScript Functions Matter

JavaScript is flexible — sometimes too flexible. TypeScript introduces structure by enforcing types, reducing bugs and making your code easier to understand and maintain.

With TypeScript, functions can clearly define:

• What kind of arguments they accept
• What type of result they return
• Whether certain parameters are required or optional

Here’s a quick example:

function greet(name: string = "Dev"): string {
  return `Hello, ${name}!`;
}

`

This function:

• Takes a name parameter of type string
• Has a default value ("Dev")
• Returns a string

And TypeScript will enforce all of that at compile-time!

🧠 Use Cases Covered in the Video

• Real-life function examples
• Why arrow functions behave differently (especially with this)
• Tips for writing scalable functions in a TypeScript project

🔖 Hashtags

`txt

TypeScript #TypeScriptFunctions #WebDevelopment #JavaScriptToTypeScript #CodingTutorial #FrontendDev #DevCommunity #LearnToCode

`

🙌 Final Thoughts

This video is part of my ongoing TypeScript series. If you're serious about becoming a better web developer, learning TypeScript is non-negotiable.

Let me know what you'd like to learn next — and don’t forget to like, share, and subscribe if you find the video helpful!

📌 Watch the video now

✍️ Samson Njoku
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