How to print the range of int,float, double datatpye in c++

Answer 1

Simply add

#include <limits>

to the top of the code, then make some query using

std::numeric_limits<T>::min();
std::numeric_limits<T>::max();

for getting the lower and upper bound of the arithmetic type ¹
T, respectively.

●●Example●●

cout << numeric_limits<int>::min() << endl;
cout << numeric_limits<int>::max() << endl;

_____
¹
https://en.cppreference.com/w/cpp/types/numeric_limits

Answer 2

int Typical Range = -2147483648 to 2147483647

float Typical Range = +/- 3.4e +/- 38 (~7 digits)

double Typical Range = +/- 1.7e +/- 308 (~15 digits)

--------------------------------------------------

#include <iostream>
using namespace std;

int main() {
cout << "Size of int : " << sizeof(int) << endl;
cout << "Size of float : " << sizeof(float) << endl;
cout << "Size of double : " << sizeof(double) << endl;

return 0;
}