loops - c++ confusion on outputs -

this might seem stupid question, dont understand difference between these functions. setting both of these 0, why xxx() print 0,2,4,6,4,2,0 , xxy() print regular 0,1,2,3,4,5. question i'm asking is, why xxx() reduce after hits max value allowed '6'

void xxx(int n)  {     cout << n;     if (n < 5)      {         xxx(n + 2);         cout << n;;     } } void xxy(int n)  {     cout << n;     if (n < 5)         xxy(n + 1); }  int main() {    xxx(0);    xxy(0);  } 

well... pay atención here:

cout << n; if (n < 5)  {     xxx(n + 2);     cout << n; } 

when have recursive call xxx(n+2) current "iteration" stacked start new function. when function ends, previous iteration proceeds normally.

therefore when max value (6) reached, iteration end continuing cout of previous "iteration"... in previous iteration n value 4... value displayed , iteration end continuing cout of n in previous iteration 2 , on...

in second function notes there isnt cout after of xxy recursive call, if put it, similar behavior displayed.

i hope have understood me... greetings