What is the default value of long in Java?

Asked by: Mahi Torron

asked in category: General Last Updated: 15th April, 2020

What is the default value of long in Java?

Default Value of Data Types in Java :
Data Type Default Value (for fields)
long 0L
float 0.0f
double 0.0d
char ‘u0000’

Furthermore, what is the default value for long?

Default Values

Data Type Default Value (for fields)
int 0
long 0L
float 0.0f
double 0.0d

Also Know, what is the default value of list in Java? Either just ignore the elements or throw an Exception. By default ArrayList capacity is 10. All of them are null by default until you add your elements into it. But calling size() will give you number of elements that you have added.

Subsequently, one may also ask, what is the default value of float in Java?

float data type is a single-precision 32-bit IEEE 754 floating point. Wrapper Class: Float Float is mainly used to save memory in large arrays of floating point numbers. Default value: 0.0f. Example: float f1 = 24.5f; The default data type of floating-point number is double.

What is a long in Java?

long: The long data type is a 64-bit two’s complement integer. 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. Use this data type when you need a range of values wider than those provided by int.

39 Related Question Answers Found

What is the default data type?

Certain columns and data types have predefined or assigned default values. For example, default column values for the various data types are as follows: NULL. 0 Used for small integer, integer, decimal, single-precision floating point, double-precision floating point, and decimal floating point data type.

What is default Boolean value?

The default value for a Boolean (object) is null . The default value for a boolean (primitive) is false .

What is byte [] in Java?

A byte in Java is 8 bits. It is a primitive data type, meaning it comes packaged with Java. Bytes can hold values from -128 to 127.

How do you convert long to int?

long l = 42; int i = (int) l; However, a long can hold more information than an int , so it’s not possible to perfectly convert from long to int , in the general case. If the long holds a number less than or equal to Integer. MAX_VALUE you can convert it by casting without losing any information.

What are the 8 data types in Java?

Primitive types are the most basic data types available within the Java language. There are 8: boolean , byte , char , short , int , long , float and double .

What is default Boolean value in C#?

The default value of a variable of reference type is null. For bool, the default value is false. For an enum type, the default value is 0. For a struct type, the default value is obtained by setting all value type fields to their default values.

What is the size of Boolean variable?

A Boolean has 8 bytes of header, plus 1 byte of payload, for a total of 9 bytes of information. The JVM then rounds it up to the next multiple of 8.

What is the default data type in Java?

Int Data Type Its minimum value is – 2,147,483,648and maximum value is 2,147,483,647. Its default value is 0. The int data type is generally used as a default data type for integral values unless if there is no problem about memory.

What is null in Java?

In Java, null is a “placeholder” value that – as so many before me have noted – means that the object reference in question doesn’t actually have a value. Void, isn’t null, but it does mean nothing. In the sense that a function that “returns” void doesn’t return any value, not even null.

What do u mean by variable?

In programming, a variable is a value that can change, depending on conditions or on information passed to the program. Typically, a program consists of instruction s that tell the computer what to do and data that the program uses when it is running.

Can constructor be made final?

No Constructors can NEVER be declared as final. Your compiler will always give an error of the type “modifier final not allowed” Final, when applied to methods, means that the method cannot be overridden in a subclass. Constructors are NOT ordinary methods. So there is NO SENSE in declaring it final.

How do you declare a 64 bit integer in Java?

3 Answers. The size of an int in Java is completely independent of the 32-bitness or 64-bitness of a JDK. It is always 4 bytes = 32 bits = −2,147,483,648 to 2,147,483,647. If you want a 64-bit integer, use a long , which is always 64 bits = 8 bytes.

What is the default value of an object in Java?

Default values are same as instance variables. For numbers, the default value is 0; for Booleans, it is false; and for object references, it is null. Values can be assigned during the declaration or within the constructor.

What is a double?

A double is a double-precision, 64-bit floating-point data type. It accommodates 15 to 16 digits, with a range of approximately 5.0 × 10−345 to 1.7 × 10308.

Leave a Reply

Your email address will not be published.