For Loops Answers 2

int i = 0;
int j = 0;
int k = 2;

for(i = 0; i < 100; i = i + 10)
{
   j += (k * i);
}
System.out.println(j);

j = j + 0 = 0

j = j + 20 = 20

j = j + 40 = 60

j = j + 60 = 120

j = j + 80 = 200

j = j + 100 = 300

j = j + 120 = 420

j = j + 140 = 560

j = j + 160 = 720

j = j + 180 = 900

Note that there is no 200, since i = 100 makes (i < 100) false

So, all this means is 0+20+40+60+80+100+120+140+160+180 = 900

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