Arrow Functions in JavaScript: Braces or No Braces?

Ambiguity in Arrow Functions: Braces or not?

In the midst of following esteemed programming lessons, a dilemma arose concerning arrow functions. When incorporating curly braces ({ }), a function seemed to malfunction during tests. However, when the braces were removed, all worked seamlessly.

To unravel this mystery, let's delve into the subtleties of arrow functions. When a pair of braces forms a block, a list of statements is introduced, necessitating an explicit return statement to yield an output. In this case, the presence of braces necessitates the addition of the return keyword:

(one) => {
  return oneTodo(one, action);
}

Alternatively, omitting the braces creates a concise body for the arrow function. This body consists of a sole expression, whose result becomes the function's return value. Thus, when the parentheses alone enclose the arrow function, the return statement is implied:

(one) => oneTodo(one, action)

Understanding this nuance ensures the proper functioning of arrow functions, allowing for concise and efficient code in JavaScript development.

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