[SOLVED] Explain the small problem in c#

Question

Here it is:

int i;
for(i = 0; i < 15; i += 7) {}
Console.Write(i)

why output of this code is 21 ?

Answer 1

The loop goes:
i = 0 ; 0 < 15 //true
i += 7
i = 7 ; 7 < 15 //true
i += 7
i = 14 ; 14 < 15 //true
i += 7
i = 21 ; 21 < 15 //false
Loop ends. i is 21.

Answer 2

CarrieForle thank you for the explanation !