What is the default value of long in Java?

What is a long value Java?

The long is a numeric data type in Java. This is also the primitive type. The long type takes 64 bits of memory. The maximum value that a long type variable can store is 9,223,372,036,854,775,807L. The minimum value is -9,223,372,036,854,775,808L.

What is long class in Java?

The Long class wraps a value of the primitive type long in an object. An object of type Long contains a single field whose type is long . In addition, this class provides several methods for converting a long to a String and a String to a long , as well as other constants and methods useful when dealing with a long .

What is difference between long and int in Java?

The basic difference between the type int and long is of their width where int is 32 bit, and long is 64 bits. … In Java, the range of type int is from –2,147,483,648 to 2,147,483,647 whereas, the range of type long is from –9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 which is very much greater than type int.

Why Long is used in Java?

The Java long keyword is a primitive data type. It is used to declare variables. It can also be used with methods. It can hold a 64-bit two’s complement integer.

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Is long a Java type?

long: The long data type is a 64-bit two’s complement integer. The signed long has a minimum value of -263 and a maximum value of 263-1. In Java SE 8 and later, you can use the long data type to represent an unsigned 64-bit long, which has a minimum value of 0 and a maximum value of 264-1.

Should I use long or long in Java?

Always use the simplest thing that works, so if you need any of the features of Long , use Long otherwise use long .

What is the range of int in Java?

Also known as an integer, int type holds a wide range of non-fractional number values. Specifically, Java stores it using 32 bits of memory. In other words, it can represent values from -2,147,483,648 (-231) to 2,147,483,647 (231-1).

Are variables private by default Java?

By default, the variables and methods of a class are accessible to members of the class itself and to other classes in the same package. … As we mentioned earlier, methods and variables declared as private are accessible only within their class.

What is class variable Java?

In object-oriented programming with classes, a class variable is any variable declared with the static modifier of which a single copy exists, regardless of how many instances of the class exist. Note that in Java, the terms “field” and “variable” are used interchangeably for member variable.

What is a local variable’s default value?

The default value of the local variable is NULL in JAVA, no primitive values or object references.

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How many digits is a long Java?

long 8 bytes -9,223,372,036,854,775,808 to 9,223,372,036,854,775,80. float 4 bytes 7 decimal digits.

What does double do in Java?

Java double is used to represent floating-point numbers. It uses 64 bits to store a variable value and has a range greater than float type.