Description: A function expression in JavaScript is a way to define a function using a syntax that allows assigning the function to a variable. This technique is fundamental in modern programming as it enables the creation of anonymous functions and passing them as arguments to other functions. Function expressions are commonly used in various programming contexts to perform operations on data, allowing for efficient manipulation and transformation of information. They are particularly useful in the development of software where functions may need to be treated as first-class citizens, enhancing flexibility and reusability. In TypeScript, which is a superset of JavaScript, function expressions are also used, but with the advantage of being able to define types, enhancing code readability and maintainability. In summary, function expressions are a powerful tool in software development, allowing for greater flexibility and functionality in programming.
