Which data type we used in c++ language? if we want to store largest number like e.g12345678910

Answer 1

What are you doing that you need such a big number though?

Answer 2

cin >> any phone in string:

#include <iostream>
#include <string>
using namespace std;

int main() {

string phoneNumber;
cout << "Type in your phone number" << endl;
getline(cin, phoneNumber);
cout << "Your phone number is: " << phoneNumber << endl;

return 0;
}

Answer 3

unsigned long long

from 0 up to 18,446,744,073,709,551,615

But what are you doing with such big numbers?
Phone numbers for example can be stored as a string.
And distances between stars in AU or light years.

Answer 4

Coding Santa thanks done

Answer 5

Ipang yes

Answer 6

Coding Santa how can we cin>> any phone in string write an example?

Answer 7

You can use double or long double instead of int you can store up to 15 digit i think

Answer 8

If you want to just store that number, use string

Answer 9

Michal Doruch give an example

Answer 10

This is very small number which can be stored by using uint64_t.
But if in future you need to store very large number which is not supported by C/C++ you can use arbitrary precision.
Python also use that technique to store long numbers.
You can take a look at GMP library. Limit of that number will depend upon your RAM

https://stackoverflow.com/questions/1218149/arbitrary-precision-arithmetic-explanation

https://en.m.wikipedia.org/wiki/Arbitrary-precision_arithmetic

https://gmplib.org/