What are some examples of functions in Java?

What are some examples of functions in Java?

In Java, functions are defined as methods. For example, a simple function to add two numbers could look like this:

public int add(int a, int b) {
    return a + b;
}

Can you show me a function that returns a string?

Sure! Here's an example of a function that returns a greeting string:

public String greet(String name) {
    return "Hello, " + name + "!";
}

What about a function that calculates the factorial of a number?

Here's a recursive function to calculate the factorial:

public int factorial(int n) {
    if (n == 0) return 1;
    return n * factorial(n - 1);
}

Can you explain how to use parameters in functions?

Certainly! Parameters allow you to pass values into functions. For example:

public void printSum(int a, int b) {
    System.out.println(a + b);
}
``` This function takes two integers and prints their sum.