int to long Java

After knowing primitive data types and Java rules of Data Type Casting (Type Conversion), let us cast int to long.

The int takes 4 byte of memory and long takes 8 bytes of memory. Assignment 4 bytes of memory to 8 byte of memory is done implicitly (automatic conversion).

byte –> short –> int –> long –> float –> double

The left-side value can be assigned to any right-side value and is done implicitly. The reverse like long to int requires explicit casting.

Examples of implicit casting

int x = 10;
longt y = x;

byte x = 10;
short y = x;

Following program on int to long explains where int is assigned to long implicitly.

public class Conversions
{
  public static void main(String args[])
  {
    int i1 = 10;              // 4 bytes
    long l1 = i1;             // 4 bytes assigned to 8 bytes

    System.out.println("int value: " + i1);              // prints 10
    System.out.println("Converted long value: " + l1);   // prints 10
  }
}

Output screenshot of int to long Java

long l1 = i1;

The int i1 is assigned to long l1. This is done implicitly by JVM as it is implicit casting between int of 4 bytes and long of 8 bytes. It is also known as widening conversion.

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