When should you use long long int?

long long int data type in C++ is used to store 64-bit integers. It is one of the largest data types to store integer values, unlike unsigned long long int both positive as well as negative.

Why do we use long long int?

The long long takes twice as much memory as long. In different systems, the allocated memory space differs. On Linux environment the long takes 64-bit (8-bytes) of space, and the long long takes 128-bits (16-bytes) of space. This is used when we want to deal with some large value of integers.

What is difference between long int and long long int?

long and long int are identical. So are long long and long long int . In both cases, the int is optional. As to the difference between the two sets, the C++ standard mandates minimum ranges for each, and that long long is at least as wide as long .

Is Long Long faster than int?

1 Answer. This question is impossible to answer universally in a sense whether long is faster than int . The code could be ran on a 16-bit platform with 32-bit long and 16-bit int on which the int would probably be faster – but not necessarily.

Is Long slower than int?

‘int’ runs much faster. Conclusion: Use “int” data type instead of “long” as much as you can to get better execution performance in interpreted-only mode.

Is Int32 faster than Int64?

Int32 will be equally as efficient on all x86, x64, and IA64. On an x64 and on an IA64 both Int32 and Int64 are equally as efficient. On an x86 Int32 will be more efficient than an Int64.

How many bits is a long long int?

ILP32 and LP64 data models and data type sizes

Data Type	32-bit sizes (in bytes)	64-bit sizes (in bytes)
int	4	4
long	4	8
long long	8	8
float	4	4

What is the difference between Long Long and long int?

The long data type is a 64-bit signed two’s complement integer. The long is a larger data type than int. The difference between int and long is that int is 32 bits in width while long is 64 bits in width.

What is the size of long int?

The size of the “int” integer type is 4 bytes and the size of the “long long” integer type is 8 bytes for all the above combinations of operating system and architecture. On Windows, the representation of “long double” may be increased to 10 bytes by use of the command line switch /Qlong-double. The corresponding memory allocation is 16 bytes.

What is “long unsigned int”?

In C, the long int data type occupies 4 bytes (32 bits) of memory to store an integer value. long int or signed long int data type denotes a 32 – bit signed integer that can hold any value between -2,147,483,648 (-2 31) and 2,147,483,647 (2 31 -1). unsigned long int data type denotes a 32 – bit integer.