Java long assignment confusing

Question

Why does this java code

long a4 = 1L;
long a3 = 1;
long a2 = 100L * 1024 * 1024 * 1024;
long a1 = 100 * 1024 * 1024 * 1024;
System.out.println(a4);
System.out.pr         


        

Answer 1

Here's what you did : You assigned 100 * 1024 * 1024 * 1024 to a long data type but you didn' said that 100 * 1024 * 1024 * 1024 is a long value

By default java compiler thinks that its an integer. Since integer cannot hold that much value, it will show wrong result. Hope it helps !