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Welcome to JavaTacties. In this video, we'll learn how to find the factorial of a number using Java 8's Stream API and the BigInteger class. The factorial of a number is the product of all positive integers up to that number, and it's a common mathematical operation that has many practical uses in computing and science.

We'll start by creating a new Java class called Factorial and defining a variable called number to represent the number we want to find the factorial of. Then, we'll use the Stream API to create a stream of BigIntegers that starts with 1 and increments by 1 at each step, and limit it to the first number integers. Finally, we'll reduce the stream of BigIntegers to a single BigInteger by multiplying all the values together.

By using the Stream API and the BigInteger class, we can handle very large numbers and compute factorials efficiently and elegantly. This technique is a good example of how Java 8's functional programming features can simplify complex algorithms and make code more concise and readable.

If you're interested in learning more about Java 8 and functional programming, be sure to check out our other tutorials and subscribe to our channel for more content. Thanks for watching! #Java8 #StreamAPI #BigInteger #factorials #iterate #reduce #multiply