C language = To check if a year is a leap year or not

 To check if a year is a leap year or not

#include<stdio.h>

void main()

{

int a;

char ch[10];

printf("enter a Year\n");

scanf("%d",&a);

if(a%100==0)

{

if(a%400==0)

{

printf("it is a leap year %d\n",a);

}

else

{

printf("it is not a leap year %d",a);

}

    }

    else {

if(a%4==0)

{

printf("it is a leap year %d\n",a);

}

else

{

printf("it is not a leap year %d",a);

    }

}

}