The simple recursive function doesn't work well - matlab

Question

It's just an easy recursive function test.
It should stop at n = 3, but not.
Could you please tell me where is wrong in my code?
Thank you!
>> recursiveFunction(0)
101
1
g
102
1
g
103
1
2
3
2
g
103
1
2
3
3
g
103
1
2
3
2
g
102
1
g
103
1
2
3
2
g
103
1
2
3
3
g
103
1
2
3
3
g
102
1
g
103
1
2
3
2
g
103
1
2
3
3
g
103
1
2
3
function recursiveFunction(callHierarchie)
callHierarchie = callHierarchie + 1;
disp(callHierarchie + 100);
for n = 1:3
disp(n);
if callHierarchie <= 2
disp('g');
recursiveFunction(callHierarchie);
end
end
end

Answer 1

The problem is both how you're generating your output and how you're interpreting your output. Here's a Python equivalent function that generates the same output:
def recursiveFunction1(callHierarchie):
callHierarchie = callHierarchie + 1
print("{:>6}".format(callHierarchie + 100))
for n in range(1, 4):
print("{:>6}".format(n))
if callHierarchie <= 2:
print('g')
recursiveFunction(callHierarchie)
recursiveFunction(0)
Folks can verify it produces the same output. Let's modify the code to indent based on the recursion level:
def recursiveFunction(callHierarchie):
callHierarchie = callHierarchie + 1
print(" " * callHierarchie, "{:>6}".format(callHierarchie + 100))
for n in range(1, 4):
print(" " * callHierarchie, "{:>6}".format(n))
if callHierarchie <= 2:
print(" " * callHierarchie, 'g')
recursiveFunction(callHierarchie)
Now the output displays slightly differently:
% python3 test.py
101
1
g
102
1
g
103
1
2
3
2
g
103
1
2
3
3
g
103
1
2
3
2
g
102
1
g
103
1
2
3
2
g
103
1
2
3
3
g
103
1
2
3
3
g
102
1
g
103
1
2
3
2
g
103
1
2
3
3
g
103
1
2
3
%
You can see that n does stop at 3, but the extra numbers you were seeing were n at a different level of recursion!