What are lambda expressions or arrow functions?

Arrow functions (also known as "lambda expressions") provide a concise syntax for writing function expressions in JavaScript. Introduced in ES6, arrow functions are often shorter and more readable, especially for simple operations or callbacks.

#### Key Features:

• Arrow functions do not have their own this, arguments, super, or new.target bindings. They inherit these from their surrounding (lexical) context.
• They are best suited for non-method functions, such as callbacks or simple computations.
• Arrow functions cannot be used as constructors and do not have a prototype property.
• They also cannot be used with new, yield, or as generator functions.

#### Syntax Examples:

    const arrowFunc1 = (a, b) => a + b;    // Multiple parameters, returns a + b
    const arrowFunc2 = a => a * 10;        // Single parameter (parentheses optional), returns a * 10
    const arrowFunc3 = () => {};           // No parameters, returns undefined
    const arrowFunc4 = (a, b) => {
      // Multiple statements require curly braces and explicit return
      const sum = a + b;
      return sum * 2;
    };