Leap year logic confusion

Question

I really don't understand the logic of performing:-

if(num%400==0)
stmts;
else if(num%100==0)
stmts;

for testing a leap year. Isn't it enough for just finding modulus of 100?

Thanks in advance!!

I am voting to close this question as off-topic, since it's about general knowledge but not programming. — Eugene Sh., Mar 04 '15 at 15:14
This is not the correct test for a leap year, you want `(year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)` — David Ranieri, Mar 04 '15 at 15:14

haccks · Answer 1 · 2015-03-04T15:21:33.830

The logic behind whether a year is leap or not:

So, the condition would be

if((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))  
    printf("Year is a leap year\n");
else  
    printf("Not a leap year\n");

score 0 · Answer 2 · answered Mar 04 '15 at 15:12

0

No. Every century year is NOT a leap year. Only those divisible by 400 are.

answered Mar 04 '15 at 15:12

2 Answers2