在Scala中可以在方法中嵌套定义方法。下面的例子展示了 factorial 方法用于计算给定数字的阶乘
def factorial(x: Int): Int = { def fact(x: Int, accumulator: Int): Int = { if (x <= 1) accumulator else fact(x - 1, x * accumulator) } fact(x, 1) } println("Factorial of 2: " + factorial(2)) println("Factorial of 3: " + factorial(3))
输出结果如下:
Factorial of 2: 2
Factorial of 3: 6
原文：https://www.cnblogs.com/zhouwenyang/p/13886016.html