Function expressions in JavaScript offer flexibility and readability by defining functions as values assigned to variables or properties. They're useful for event listeners, higher-order functions, and more, but require best practices such as descriptive names and concise code.
Function expressions allow defining functions without the `function` keyword by assigning them to variables or properties using the assignment operator (=), enabling flexibility, readability, and immediately invoked function expressions (IIFE). Assigning functions to variables is essential for real-world development scenarios like event listeners, modular code, and functional programming in JavaScript.
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