According to C99 standard, long long is an integer type which is at least 64-bit wide. There are two integer 64-bit types specified: long long int and unsigned long long int. So, yes, this is the biggest integer type specified by C language standard (C99 version).
Also asked, what is long in C?
Long. Long is a data type used in programming languages, such as Java, C++, and C#. A constant or variable defined as long can store a single 64-bit signed integer. Because the long data type is signed, the possible integers range from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807, including 0.
Secondly, how many bytes is a long long?
Data Types and Sizes
|Type Name||32–bit Size||64–bit Size|
|char||1 byte||1 byte|
|short||2 bytes||2 bytes|
|int||4 bytes||4 bytes|
|long||4 bytes||8 bytes|
Is Long a datatype in C?
Long long signed integer type. Capable of containing at least the [−9,223,372,036,854,775,807, +9,223,372,036,854,775,807] range; thus, it is at least 64 bits in size.
Why int is 2 or 4 bytes?
The size of an int is really compiler dependent. Back in the day, when processors were 16 bit, an int was 2 bytes. Nowadays, it's most often 4 bytes on a 32-bit as well as 64-bit systems. Still, using sizeof(int) is the best way to get the size of an integer for the specific system the program is executed on.