[SOLVED] Question about switch statement

Question

case 2:
if (((year % 4 == 0) &&
!(year % 100 == 0))
|| (year % 400 == 0))
numDays = 29;
else
numDays = 28;
break;

This is used to find the correct number of days in February using a switch statement. Can someone please break down what is happening using explanation or psuedocode.

(What I'm having trouble understanding is the modulus)

Thank you very much.

Answer 1

This code is checking the leap year rules. Those rules say that there is a leap year every four years except if the year is a multiple of 100 except when it's a multiple of 400.

Answer 2

After looking at it more closely, and with your answer, I understand now. Thank you!