Thread by @ATechAjay

💛 Day 2️⃣4️⃣ / 3️⃣0️⃣ days of basics in JavaScript series!

→ What is an arrow function?

→ What is the syntax of the arrow function?

#javascript30

Let me explain!🧵⇩

📌 What is an arrow function?

→ This is also similar to function declaration or function expression.

→ Arrow function was introduced in ES6(2015).

→ It allows us to define a function with an arrow (=>) symbol.

📌 What is the syntax of the arrow function?

→ This is the simple syntax of the arrow function

𝗣𝗮𝗿𝗮𝗺𝗲𝘁𝗲𝗿 => 𝗘𝘅𝗽𝗿𝗲𝘀𝘀𝗶𝗼𝗻

👀Here:

- "square" is the name of the function

- "a" is the parameter of the function

- "a * a" is the function expression

→ This function is also call/invoke/run as the function expression.

→ That means we can call the arrow function using the name of the variable.

→ Here "square" is the name of the variable.

📌 But if we have only one parameter then we can omit the parentheses.

→ As well as we can omit the return keyword.

→ Because the arrow function automatically returns the value to the variable if only one line on code.

→ Or, the arrow function returns the values implicitly.

📌 But we have more than one line of code then we have to use braces { }.

→ As well as now we have to use the "return" keyword in the block of code.

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