C difficulty recursion

Got the problem, please find the explanation in the following link https://www.google.com/amp/s/takeuforward.org/data-structure/print-n-to-1-and-1-to-n-using-recursion/%3Famp=1

Printed output 

/tmp/BmyDsKtoob.o
Hello world99 bottles of beer on the wall. 99 bottles of beer.
Take one down, pass it around, 98 bottles of beer on the wall.
98 bottles of beer on the wall. 98 bottles of beer.
Take one down, pass it around, 97 bottles of beer on the wall.
97 bottles of beer on the wall. 97 bottles of beer.
Take one down, pass it around, 96 bottles of beer on the wall.
96 bottles of beer on the wall. 96 bottles of beer.
Take one down, pass it around, 95 bottles of beer on the wall.
95 bottles of beer on the wall. 95 bottles of beer.
Take one down, pass it around, 94 bottles of beer on the wall.
94 bottles of beer on the wall. 94 bottles of beer.
Take one down, pass it around, 93 bottles of beer on the wall.
93 bottles of beer on the wall. 93 bottles of beer.
Take one down, pass it around, 92 bottles of beer on the wall.
92 bottles of beer on the wall. 92 bottles of beer.
Take one down, pass it around, 91 bottles of beer on the wall.
91 bottles of beer on the wall. 91 bottles of beer.
Take one down, pass it around, 90 bottles of beer on the wall.
90 bottles of beer on the wall. 90 bottles of beer.
Take one down, pass it around, 89 bottles of beer on the wall.
89 bottles of beer on the wall. 89 bottles of beer.
Take one down, pass it around, 88 bottles of beer on the wall.
88 bottles of beer on the wall. 88 bottles of beer.
Take one down, pass it around, 87 bottles of beer on the wall.
87 bottles of beer on the wall. 87 bottles of beer.
Take one down, pass it around, 86 bottles of beer on the wall.
86 bottles of beer on the wall. 86 bottles of beer.
Take one down, pass it around, 85 bottles of beer on the wall.
85 bottles of beer on the wall. 85 bottles of beer.
Take one down, pass it around, 84 bottles of beer on the wall.
84 bottles of beer on the wall. 84 bottles of beer.
Take one down, pass it around, 83 bottles of beer on the wall.
83 bottles of beer on the wall. 83 bottles of beer.
Take one down, pass it around, 82 bottles of beer on the wall.
82 bottles of beer on the wall. 82 bottles of beer.
Take one down, pass it around, 81 bottles of beer on the wall.
81 bottles of beer on the wall. 81 bottles of beer.
Take one down, pass it around, 80 bottles of beer on the wall.
80 bottles of beer on the wall. 80 bottles of beer.
Take one down, pass it around, 79 bottles of beer on the wall.
79 bottles of beer on the wall. 79 bottles of beer.
Take one down, pass it around, 78 bottles of beer on the wall.
78 bottles of beer on the wall. 78 bottles of beer.
Take one down, pass it around, 77 bottles of beer on the wall.
77 bottles of beer on the wall. 77 bottles of beer.
Take one down, pass it around, 76 bottles of beer on the wall.
76 bottles of beer on the wall. 76 bottles of beer.
Take one down, pass it around, 75 bottles of beer on the wall.
75 bottles of beer on the wall. 75 bottles of beer.
Take one down, pass it around, 74 bottles of beer on the wall.
74 bottles of beer on the wall. 74 bottles of beer.
Take one down, pass it around, 73 bottles of beer on the wall.
73 bottles of beer on the wall. 73 bottles of beer.
Take one down, pass it around, 72 bottles of beer on the wall.
72 bottles of beer on the wall. 72 bottles of beer.
Take one down, pass it around, 71 bottles of beer on the wall.
71 bottles of beer on the wall. 71 bottles of beer.
Take one down, pass it around, 70 bottles of beer on the wall.
70 bottles of beer on the wall. 70 bottles of beer.
Take one down, pass it around, 69 bottles of beer on the wall.
69 bottles of beer on the wall. 69 bottles of beer.
Take one down, pass it around, 68 bottles of beer on the wall.
68 bottles of beer on the wall. 68 bottles of beer.
Take one down, pass it around, 67 bottles of beer on the wall.
67 bottles of beer on the wall. 67 bottles of beer.
Take one down, pass it around, 66 bottles of beer on the wall.
66 bottles of beer on the wall. 66 bottles of beer.
Take one down, pass it around, 65 bottles of beer on the wall.
65 bottles of beer on the wall. 65 bottles of beer.
Take one down, pass it around, 64 bottles of beer on the wall.
64 bottles of beer on the wall. 64 bottles of beer.
Take one down, pass it around, 63 bottles of beer on the wall.
63 bottles of beer on the wall. 63 bottles of beer.
Take one down, pass it around, 62 bottles of beer on the wall.
62 bottles of beer on the wall. 62 bottles of beer.
Take one down, pass it around, 61 bottles of beer on the wall.
61 bottles of beer on the wall. 61 bottles of beer.
Take one down, pass it around, 60 bottles of beer on the wall.
60 bottles of beer on the wall. 60 bottles of beer.
Take one down, pass it around, 59 bottles of beer on the wall.
59 bottles of beer on the wall. 59 bottles of beer.
Take one down, pass it around, 58 bottles of beer on the wall.
58 bottles of beer on the wall. 58 bottles of beer.
Take one down, pass it around, 57 bottles of beer on the wall.
57 bottles of beer on the wall. 57 bottles of beer.
Take one down, pass it around, 56 bottles of beer on the wall.
56 bottles of beer on the wall. 56 bottles of beer.
Take one down, pass it around, 55 bottles of beer on the wall.
55 bottles of beer on the wall. 55 bottles of beer.
Take one down, pass it around, 54 bottles of beer on the wall.
54 bottles of beer on the wall. 54 bottles of beer.
Take one down, pass it around, 53 bottles of beer on the wall.
53 bottles of beer on the wall. 53 bottles of beer.
Take one down, pass it around, 52 bottles of beer on the wall.
52 bottles of beer on the wall. 52 bottles of beer.
Take one down, pass it around, 51 bottles of beer on the wall.
51 bottles of beer on the wall. 51 bottles of beer.
Take one down, pass it around, 50 bottles of beer on the wall.
50 bottles of beer on the wall. 50 bottles of beer.
Take one down, pass it around, 49 bottles of beer on the wall.
49 bottles of beer on the wall. 49 bottles of beer.
Take one down, pass it around, 48 bottles of beer on the wall.
48 bottles of beer on the wall. 48 bottles of beer.
Take one down, pass it around, 47 bottles of beer on the wall.
47 bottles of beer on the wall. 47 bottles of beer.
Take one down, pass it around, 46 bottles of beer on the wall.
46 bottles of beer on the wall. 46 bottles of beer.
Take one down, pass it around, 45 bottles of beer on the wall.
45 bottles of beer on the wall. 45 bottles of beer.
Take one down, pass it around, 44 bottles of beer on the wall.
44 bottles of beer on the wall. 44 bottles of beer.
Take one down, pass it around, 43 bottles of beer on the wall.
43 bottles of beer on the wall. 43 bottles of beer.
Take one down, pass it around, 42 bottles of beer on the wall.
42 bottles of beer on the wall. 42 bottles of beer.
Take one down, pass it around, 41 bottles of beer on the wall.
41 bottles of beer on the wall. 41 bottles of beer.
Take one down, pass it around, 40 bottles of beer on the wall.
40 bottles of beer on the wall. 40 bottles of beer.
Take one down, pass it around, 39 bottles of beer on the wall.
39 bottles of beer on the wall. 39 bottles of beer.
Take one down, pass it around, 38 bottles of beer on the wall.
38 bottles of beer on the wall. 38 bottles of beer.
Take one down, pass it around, 37 bottles of beer on the wall.
37 bottles of beer on the wall. 37 bottles of beer.
Take one down, pass it around, 36 bottles of beer on the wall.
36 bottles of beer on the wall. 36 bottles of beer.
Take one down, pass it around, 35 bottles of beer on the wall.
35 bottles of beer on the wall. 35 bottles of beer.
Take one down, pass it around, 34 bottles of beer on the wall.
34 bottles of beer on the wall. 34 bottles of beer.
Take one down, pass it around, 33 bottles of beer on the wall.
33 bottles of beer on the wall. 33 bottles of beer.
Take one down, pass it around, 32 bottles of beer on the wall.
32 bottles of beer on the wall. 32 bottles of beer.
Take one down, pass it around, 31 bottles of beer on the wall.
31 bottles of beer on the wall. 31 bottles of beer.
Take one down, pass it around, 30 bottles of beer on the wall.
30 bottles of beer on the wall. 30 bottles of beer.
Take one down, pass it around, 29 bottles of beer on the wall.
29 bottles of beer on the wall. 29 bottles of beer.
Take one down, pass it around, 28 bottles of beer on the wall.
28 bottles of beer on the wall. 28 bottles of beer.
Take one down, pass it around, 27 bottles of beer on the wall.
27 bottles of beer on the wall. 27 bottles of beer.
Take one down, pass it around, 26 bottles of beer on the wall.
26 bottles of beer on the wall. 26 bottles of beer.
Take one down, pass it around, 25 bottles of beer on the wall.
25 bottles of beer on the wall. 25 bottles of beer.
Take one down, pass it around, 24 bottles of beer on the wall.
24 bottles of beer on the wall. 24 bottles of beer.
Take one down, pass it around, 23 bottles of beer on the wall.
23 bottles of beer on the wall. 23 bottles of beer.
Take one down, pass it around, 22 bottles of beer on the wall.
22 bottles of beer on the wall. 22 bottles of beer.
Take one down, pass it around, 21 bottles of beer on the wall.
21 bottles of beer on the wall. 21 bottles of beer.
Take one down, pass it around, 20 bottles of beer on the wall.
20 bottles of beer on the wall. 20 bottles of beer.
Take one down, pass it around, 19 bottles of beer on the wall.
19 bottles of beer on the wall. 19 bottles of beer.
Take one down, pass it around, 18 bottles of beer on the wall.
18 bottles of beer on the wall. 18 bottles of beer.
Take one down, pass it around, 17 bottles of beer on the wall.
17 bottles of beer on the wall. 17 bottles of beer.
Take one down, pass it around, 16 bottles of beer on the wall.
16 bottles of beer on the wall. 16 bottles of beer.
Take one down, pass it around, 15 bottles of beer on the wall.
15 bottles of beer on the wall. 15 bottles of beer.
Take one down, pass it around, 14 bottles of beer on the wall.
14 bottles of beer on the wall. 14 bottles of beer.
Take one down, pass it around, 13 bottles of beer on the wall.
13 bottles of beer on the wall. 13 bottles of beer.
Take one down, pass it around, 12 bottles of beer on the wall.
12 bottles of beer on the wall. 12 bottles of beer.
Take one down, pass it around, 11 bottles of beer on the wall.
11 bottles of beer on the wall. 11 bottles of beer.
Take one down, pass it around, 10 bottles of beer on the wall.
10 bottles of beer on the wall. 10 bottles of beer.
Take one down, pass it around, 9 bottles of beer on the wall.
9 bottles of beer on the wall. 9 bottles of beer.
Take one down, pass it around, 8 bottles of beer on the wall.
8 bottles of beer on the wall. 8 bottles of beer.
Take one down, pass it around, 7 bottles of beer on the wall.
7 bottles of beer on the wall. 7 bottles of beer.
Take one down, pass it around, 6 bottles of beer on the wall.
6 bottles of beer on the wall. 6 bottles of beer.
Take one down, pass it around, 5 bottles of beer on the wall.
5 bottles of beer on the wall. 5 bottles of beer.
Take one down, pass it around, 4 bottles of beer on the wall.
4 bottles of beer on the wall. 4 bottles of beer.
Take one down, pass it around, 3 bottles of beer on the wall.
3 bottles of beer on the wall. 3 bottles of beer.
Take one down, pass it around, 2 bottles of beer on the wall.
2 bottles of beer on the wall. 2 bottles of beer.
Take one down, pass it around, 1 bottles of beer on the wall.
1 bottles of beer on the wall. 1 bottles of beer.
Take one down, pass it around, 0 bottles of beer on the wall.
There are simply no more bottles of beer on the wall.
Put a bottle in the recycling, 1 empty bottles in the bin.
Put a bottle in the recycling, 2 empty bottles in the bin.
Put a bottle in the recycling, 3 empty bottles in the bin.
Put a bottle in the recycling, 4 empty bottles in the bin.
Put a bottle in the recycling, 5 empty bottles in the bin.
Put a bottle in the recycling, 6 empty bottles in the bin.
Put a bottle in the recycling, 7 empty bottles in the bin.
Put a bottle in the recycling, 8 empty bottles in the bin.
Put a bottle in the recycling, 9 empty bottles in the bin.
Put a bottle in the recycling, 10 empty bottles in the bin.
Put a bottle in the recycling, 11 empty bottles in the bin.
Put a bottle in the recycling, 12 empty bottles in the bin.
Put a bottle in the recycling, 13 empty bottles in the bin.
Put a bottle in the recycling, 14 empty bottles in the bin.
Put a bottle in the recycling, 15 empty bottles in the bin.
Put a bottle in the recycling, 16 empty bottles in the bin.
Put a bottle in the recycling, 17 empty bottles in the bin.
Put a bottle in the recycling, 18 empty bottles in the bin.
Put a bottle in the recycling, 19 empty bottles in the bin.
Put a bottle in the recycling, 20 empty bottles in the bin.
Put a bottle in the recycling, 21 empty bottles in the bin.
Put a bottle in the recycling, 22 empty bottles in the bin.
Put a bottle in the recycling, 23 empty bottles in the bin.
Put a bottle in the recycling, 24 empty bottles in the bin.
Put a bottle in the recycling, 25 empty bottles in the bin.
Put a bottle in the recycling, 26 empty bottles in the bin.
Put a bottle in the recycling, 27 empty bottles in the bin.
Put a bottle in the recycling, 28 empty bottles in the bin.
Put a bottle in the recycling, 29 empty bottles in the bin.
Put a bottle in the recycling, 30 empty bottles in the bin.
Put a bottle in the recycling, 31 empty bottles in the bin.
Put a bottle in the recycling, 32 empty bottles in the bin.
Put a bottle in the recycling, 33 empty bottles in the bin.
Put a bottle in the recycling, 34 empty bottles in the bin.
Put a bottle in the recycling, 35 empty bottles in the bin.
Put a bottle in the recycling, 36 empty bottles in the bin.
Put a bottle in the recycling, 37 empty bottles in the bin.
Put a bottle in the recycling, 38 empty bottles in the bin.
Put a bottle in the recycling, 39 empty bottles in the bin.
Put a bottle in the recycling, 40 empty bottles in the bin.
Put a bottle in the recycling, 41 empty bottles in the bin.
Put a bottle in the recycling, 42 empty bottles in the bin.
Put a bottle in the recycling, 43 empty bottles in the bin.
Put a bottle in the recycling, 44 empty bottles in the bin.
Put a bottle in the recycling, 45 empty bottles in the bin.
Put a bottle in the recycling, 46 empty bottles in the bin.
Put a bottle in the recycling, 47 empty bottles in the bin.
Put a bottle in the recycling, 48 empty bottles in the bin.
Put a bottle in the recycling, 49 empty bottles in the bin.
Put a bottle in the recycling, 50 empty bottles in the bin.
Put a bottle in the recycling, 51 empty bottles in the bin.
Put a bottle in the recycling, 52 empty bottles in the bin.
Put a bottle in the recycling, 53 empty bottles in the bin.
Put a bottle in the recycling, 54 empty bottles in the bin.
Put a bottle in the recycling, 55 empty bottles in the bin.
Put a bottle in the recycling, 56 empty bottles in the bin.
Put a bottle in the recycling, 57 empty bottles in the bin.
Put a bottle in the recycling, 58 empty bottles in the bin.
Put a bottle in the recycling, 59 empty bottles in the bin.
Put a bottle in the recycling, 60 empty bottles in the bin.
Put a bottle in the recycling, 61 empty bottles in the bin.
Put a bottle in the recycling, 62 empty bottles in the bin.
Put a bottle in the recycling, 63 empty bottles in the bin.
Put a bottle in the recycling, 64 empty bottles in the bin.
Put a bottle in the recycling, 65 empty bottles in the bin.
Put a bottle in the recycling, 66 empty bottles in the bin.
Put a bottle in the recycling, 67 empty bottles in the bin.
Put a bottle in the recycling, 68 empty bottles in the bin.
Put a bottle in the recycling, 69 empty bottles in the bin.
Put a bottle in the recycling, 70 empty bottles in the bin.
Put a bottle in the recycling, 71 empty bottles in the bin.
Put a bottle in the recycling, 72 empty bottles in the bin.
Put a bottlein the recycling, 73 empty bottles in the bin.
Put a bottle in the recycling, 74 empty bottles in the bin.
Put a bottle in the recycling, 75 empty bottles in the bin.
Put a bottle in the recycling, 76 empty bottles in the bin.
Put a bottle in the recycling, 77 empty bottles in the bin.
Put a bottle in the recycling, 78 empty bottles in the bin.
Put a bottle in the recycling, 79 empty bottles in the bin.
Put a bottle in the recycling, 80 empty bottles in the bin.
Put a bottle in the recycling, 81 empty bottles in the bin.
Put a bottle in the recycling, 82 empty bottles in the bin.
Put a bottle in the recycling, 83 empty bottles in the bin.
Put a bottle in the recycling, 84 empty bottles in the bin.
Put a bottle in the recycling, 85 empty bottles in the bin.
Put a bottle in the recycling, 86 empty bottles in the bin.
Put a bottle in the recycling, 87 empty bottles in the bin.
Put a bottle in the recycling, 88 empty bottles in the bin.
Put a bottle in the recycling, 89 empty bottles in the bin.
Put a bottle in the recycling, 90 empty bottles in the bin.
Put a bottle in the recycling, 91 empty bottles in the bin.
Put a bottle in the recycling, 92 empty bottles in the bin.
Put a bottle in the recycling, 93 empty bottles in the bin.
Put a bottle in the recycling, 94 empty bottles in the bin.
Put a bottle in the recycling, 95 empty bottles in the bin.
Put a bottle in the recycling, 96 empty bottles in the bin.
Put a bottle in the recycling, 97 empty bottles in the bin.
Put a bottle in the recycling, 98 empty bottles in the bin.
Put a bottle in the recycling, 99 empty bottles in the bin.

I don't understand. It's increasing from 0 to 98 and you're saying it decreases. So it can be done like this example?
int oneFewer = numberOfBottles - 1;

This is recursive call happening until it reaches count o. This code is not reachable as per logic 

printf("Put a bottle in the recycling, %d empty bottles in the bin.\n",

           numberOfBottles);. 

So it start from 98 and print till 0