Rev

# Fibonacci sequence in Rev (RevBayes probabilistic programming language)
# Rev is the scripting language for RevBayes, used for Bayesian phylogenetic inference

function fibonacci(n) {
    if (n <= 0) {
        return 0
    } else if (n == 1) {
        return 1
    } else {
        return fibonacci(n - 1) + fibonacci(n - 2)
    }
}

print("Fibonacci sequence:")
for (i in 0:10) {
    result <- fibonacci(i)
    print("fib(" + i + ") = " + result)
}