How many bytes is a long int?
4 bytes
32-bit UNIX applications
| Name | Length |
|---|---|
| int | 4 bytes |
| long | 4 bytes |
| float | 4 bytes |
| double | 8 bytes |
Why is long 8 bytes?
According to the standard, long long is at least 64 bits, or say, 8 bytes. On most machines today, it is 8 bytes long. sizeof (BTW, an operator, not a function) returns its size, you can count on it. There’s no way sizeof(long long) is 8 while the size of long long is 16 .
Is 8 bytes long or 4?
No, neither the C standard nor POSIX guarantee this and in fact most Unix-like 64-bit platforms have a 64 bit (8 byte) long . Use code sizeof(long int) and check the size. It will give you the size of long int in bytes on the system you’re working currently.
Why does the size of integer depend on the machine architecture?
Yes, it depends on both processors (more specifically, ISA, instruction set architecture, e.g., x86 and x86-64) and compilers including programming model. For example, in 16-bit machines, sizeof (int) was 2 bytes. 32-bit machines have 4 bytes for int .
Is a long 8 bytes?
Integers are always represented in twos-complement form in the native byte-encoding order of your system….Data Types and Sizes.
| Type Name | 32–bit Size | 64–bit Size |
|---|---|---|
| int | 4 bytes | 4 bytes |
| long | 4 bytes | 8 bytes |
| long long | 8 bytes | 8 bytes |
Why is long only 4 bytes?
The C++ Language Specification simply states that the size of a long must be at least the size of an int . It used to be standard to have int = 2 bytes and long = 4 bytes. For some reason int grew up and long stayed the same (on Windows compilers at least).
Does size of integer depends on operating system?
Yes. This is precisely what is meant by “platform-specific definitions” for things like the size of int and the meaning of system calls. They depend not just on the OS, but also on the target hardware and compiler configuration. C datatype sizes depend on the memory model implemented by the compiler.
How the size of integer is decided?
“The sizes of short, int, and long in C/C++ are dependent upon the implementation of the language; dependent on data model, even short can be anything from 16-bit to 64-bit. For some common platforms: On older, 16-bit operating systems, int was 16-bit and long was 32-bit.