Függvénykifejezésként

Függvénykifejezésként translates to "as a function expression" in English. It refers to the way a function is defined in programming languages. Instead of using a traditional function declaration, a function expression assigns an anonymous function to a variable. This means the function doesn't have a name on its own but is accessed through the variable it's assigned to.

The syntax typically involves the `function` keyword, followed by parentheses for parameters and curly braces for the function body, all enclosed in an assignment statement. For example, in JavaScript, you might see `const greet = function(name) { return "Hello, " + name; };`. Here, `greet` is the variable holding the anonymous function.

A key characteristic of function expressions is that they are created when the script executes, unlike function declarations which are hoisted and available throughout the scope before their actual placement in the code. This can affect when and how a function can be called. Function expressions are often used for immediate invocation, callbacks, and creating closures. They offer a more flexible approach to function definition in certain programming contexts.

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