What is the default value of long in Java?
What is the default value of long in Java?
0L
Default Values
| Data Type | Default Value (for fields) |
|---|---|
| long | 0L |
| float | 0.0f |
| double | 0.0d |
| char | ” |
What is Boolean default value?
false
The default value of the bool type is false .
How long is a Boolean?
2 bytes
19.4. 3 Data types
| Data type | Storage size | Range |
|---|---|---|
| Byte | 1 byte | 0 to 255 |
| Boolean | 2 bytes | True or False |
| Integer | 2 bytes | −32,768 to 32,767 |
| Long (long integer) | 4 bytes | −2,147,483,648 to 2,147,483,647 |
What is long default value?
0
Table 3.12. Default Values
| Type | Default |
|---|---|
| sbyte, byte, short, ushort, int, uint, long, ulong | 0 |
| char | ” |
| float | 0.0f |
| double | 0.0d |
How do you create a long long in Java?
- You need to add the L character to the end of the number to make Java recognize it as a long. long i = 12345678910L;
- Yes.
What is the default value of boolean array in Java?
The boolean array can be used to store boolean datatype values only and the default value of the boolean array is false.
What is the size of boolean variable in Java?
1 bit
Primitive Data Types
| Data Type | Size |
|---|---|
| long | 8 bytes |
| float | 4 bytes |
| double | 8 bytes |
| boolean | 1 bit |
How do you use long value in Java?
How many bytes is a long long?
4 bytes
Windows 64-bit applications
| Name | Length |
|---|---|
| long | 4 bytes |
| float | 4 bytes |
| double | 8 bytes |
| long double | 8 bytes |
What is size of boolean in Java?
The object Boolean is at least one byte (for the actual value), plus the pointer size (likely 64 bits = 8 bytes, though possibly 32 bits = 4 bytes), plus whatever overhead the vtable may incur.
What is the default value for a Boolean in Java?
The default value for a Boolean (object) is null. The default value for a boolean (primitive) is false.
What is the default value of a variable in JavaScript?
Default value is false. Can be a Boolean object representing true or false, or can be null. Default value is null. If you need to ask, then you need to explicitly initialize your fields/variables, because if you have to look it up, then chances are someone else needs to do that too.
Why Java equates a Boolean to false when not initialized?
Moral of the story is that when Java allocates memory for a primitive, that memory has a value even if not initialized, which Java equates to false for a boolean.
What is the default value of an instance variable in Java?
What is the default value of instance variable in Java? Instance variables have default values. 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.
