Java Keyword Case Sensitivity

Consider the Factorial class shown below. Which of the following statements best explains why this code will fail to compile?

public class Factorial {
    public static int factorial(int n) {
        if (n <= 1)
            return 1;
        else
            Return n * factorial(n - 1);
    }
    
    public static void main(String[] args) {
        System.out.println(factorial(5));
    }
}