Python Function Recursion 3

Question:5
Python script to calculate the sum of two non –ve numbers
Sol:

def sum_nos(x,y):
    #print(x,y)
    x=x-1
    y=y+1
    
    if(x==0):
        print("sum = ",y)
    else:
        sum_nos(x,y)


while True:
    n1=int(input("Enter 1st no "))
    n2=int(input("Enter 2nd no "))
    if(n1<0 or n2<0):
        print("numbers should not be -ve")
    else:
        sum_nos(n1,n2)

    ch=input("Like to cont ... (y/n) ")
    if(ch=="y" or ch=="Y"):
        continue
    else:
        break

Output:

Enter 1st no 10
Enter 2nd no 20
sum = 30
Like to cont … (y/n) y
Enter 1st no 2
Enter 2nd no 6
sum = 8
Like to cont … (y/n) y
Enter 1st no 32
Enter 2nd no 6
sum = 38
Like to cont … (y/n) n
>>>