Tour of Scala
Nested Methods
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In Scala it is possible to nest method definitions. The following object provides a factorial method for computing the factorial of a given number:
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))
def factorial(x: Int): Int =
def fact(x: Int, accumulator: Int): Int =
if x <= 1 then accumulator
else fact(x - 1, x * accumulator)
fact(x, 1)
println("Factorial of 2: " + factorial(2))
println("Factorial of 3: " + factorial(3))
The output of this program is:
Factorial of 2: 2
Factorial of 3: 6