euclidean algorithm
println euclideanAlgorithm(20, 40)
def euclideanAlgorithm(a, b) {
b == 0 ? a : euclideanAlgorithm(b, a % b)
}
INFO
println euclideanAlgorithm(20, 40)
def euclideanAlgorithm(a, b) {
b == 0 ? a : euclideanAlgorithm(b, a % b)
}