What is long long in C++
Introduction
'long long' is a C++ data type that saves time, especially when 'long' cannot express huge integers. "Long long" data types, as their name implies, are intended to hold significantly bigger numbers than most other common data types.
Elementary Syntax
Defining a 'long long' in C++ is as simple as declaring any other data type:
long long hugeNum = 96758943210123456LL;
'LL' being used as a suffix to stand for "long long"
Memory consumption
It can take up a sizable amount of memory when 'long long' is used. It usually occupies 8 bytes, twice as much space as "long."
Range of Values
The 'long long' type offers extensive applications requiring enormous integers.
long long minValueLL = LLONG_MIN; // The smallest possible value of "long long"
long long maxValueLL = LLONG_MAX; // Largest value 'long long'
When To Use 'long long'
It is important to use 'long long' only when necessary, despite its tremendous capacity being quite alluring. Applications may become slower due to memory consumption caused by excessive or unnecessary use. Consider the trade-offs associated with employing extended data types such as 'long long' when determining the needs for your programmes.
Effects on Efficiency
A larger memory footprint may impact an application's performance and take up more space. In memory-bound activities, acquiring bigger memory chunks may result in a little delay.
Example:
long first_number = 23451621L;
long long second_number = 653141595177LL;
Memory Usage: 'long' vs 'long long'
Memory use is a critical component in every computing environment. Knowing the memory that different data kinds require is essential when making judgments about them. 'long' and 'long long' are designed to handle bigger numbers, but their memory implications are very different.
Making The Correct Type Selection
It is not sufficient to base your decision between "long" and "long long" just on the size of the number. It should also consider the program's efficiency requirements and memory limitations. The extended range provided by 'long long' comes at the expense of higher memory use.
Before going for "long long," evaluating whether "long" will do in situations when memory is limited or efficiency is critical would be wise. Making the correct decisions here can strike the ideal balance between capacity and conservation, saving materials and improving productivity.
Algorithms' Impact
The size of different data kinds can affect some algorithms. For example, sorting algorithms may perform differently depending on the kind of data being organized. To determine the genuine effect, always compare your algorithms to real-world data.
Even while 'long' and 'long long' provide the flexibility to manage big numbers, it's important to consider the possible efficiency trade-offs. For a smooth fusion of performance and performance, always measure, profile, and optimize according to your application's particular requirements and limitations.
Example of how to use long long in C++
Code:
#include <iostream>
int main()
{
int num = 764528260;
long int num1 = 814861748710784;
long long int num2 = 7242837417918;
unsigned long long int num3= 3782401387891785467;
std::cout << "num=" << num << " " << sizeof(num) << "bytes" << std::endl;
std::cout << "num1=" << num1 << " " << sizeof(num1) << "bytes" << std::endl;
std::cout << "num2=" << num2 << " " << sizeof(num2) << "bytes" << std::endl;
std::cout << "num3=" << num3 << " " << sizeof(num3) << "bytes" << std::endl;
system("pause");
return 0;
}
Output: