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A recursive function does not work as I expect it

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This recursive function should return "1" in the first call (with "3"), but it still returns "false" ("0").

int init()

{

 Print ("3: ",recursiveFunction(3));

 Print("12: ",recursiveFunction(12));
 
 Print("25: ",recursiveFunction(25));
 
}


bool recursiveFunction (int a=0, int counter=1)

{

 if (a+3==15)

 { 
 
  Print ("Attempt # ",counter," was successful.");

  return (true);
 
 }

 else if (a<12)
 
 {
 
  counter++;
 
  recursiveFunction (a+1,counter);
 
 }
 
 else return (false);
 
}


Output:

25: 0
12: 1
Attempt # 1 was successful.
3: 0
Attempt # 9 was successful.

Please let me know why this happens.

With any value of "a" that is less than 12 the function should still return "true" eventually, I think.

Thank you.

When you recurse, you do not return anything.
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