Concise Body Arrow Functions

Concise body arrow functions provide a more compact and elegant way to write functions, without compromising functionality. This syntax is especially useful in scenarios where we need to write short, one-liner functions or when we want to streamline our code.

To define a concise body arrow function, we use the following syntax:

1const functionName = (parameter) => statement;

The parentheses can be omitted if there is only one parameter, and the function has no parameters at all. Similarly, if the function body is a single expression, we can omit the curly braces.

Let's go over some examples to illustrate how concise body arrow functions work:

Example 1:

1const multiply = (a, b) => a * b;

Here, we define a function named multiply that takes two parameters, a and b, and returns their product. Since the function body is a single expression, we don't need curly braces.

Example 2:

1const isEven = number => number % 2 === 0;

In this example, we define a function named isEven that takes a single parameter, number. The function body consists of a boolean expression that checks if the number is even. Again, since the function body is a single expression, we don't need curly braces.