c++ - Understanding a loop output -


can explain me why output follows?

why loop runs second time after (int i) gets value 9, not less 5?

it seems if (int i) greater 5 still adds 3 body won't run second time. why?

#include <iostream> using namespace std;  int i=0;  int main() { for(;i<5;i+=3){ i=i*i; } cout << << endl;  //output:  12(i)

it works way, more or less:

i = 0 < 5 ? yes, keep on i*i = 0 i+=3 => ==3 < 5 ? yes, keep on i*i = 9 i+=3 => 12 < 5 ? no, exit loop

you write for(initialization; condition; excuteattheendofcycle): initialization executed once @ beginning, condition evaluated before each cycle, excuteattheendofcycle (i+=3, in case), it's executed @ end of each cycle, before further evaluation of condition


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