How to keep value constant in recursive function?-CodePudding

Example:

def func(n):
    if n > 10:
        return
    CONSTANT = n
    print(n   CONSTANT)
    func(n   1)

>>> func(1)
2
3
4
5
6
7
8
9
10
11

>>> func(7)
14
15
16
17

Obviously this specific task can be achieved via different routes, but I'm wondering if this is possible to do: have a constant value in a recursive function that's expressed in terms of a changing variable.

CodePudding user response：

Make it an optional parameter that you only pass in the recursive calls.

def func(n, CONSTANT = None):
    if n > 10:
        return
    if CONSTANT is None:
        CONSTANT = n
    print(n   CONSTANT)
    func(n   1, CONSTANT)

CodePudding user response：

Why don't you just make the value you passed as argument a global variable and access it from your function?