Can I put a previously declared variable as the first expression in a for loop?

[bitter field]

`int holder1 = leapCalc1;
int holder2 = leapCalc2;
int missingDays1;
int missingDays2;

for (holder1; holder1 > 0; holder1--){
if (holder1 % 100 == 0){
missingDays1 = missingDays1 - 1;
} else if (holder1 % 400 == 0){
missingDays1 = missingDays1 + 1;
} else if (holder1 % 100 == 0 && holder1 % 400 == 0){
missingDays1 = missingDays1 + 1;
}

`

[hexed mauve]

Does it run?

[bitter field]

yes I probably should've tried first before posting lol