C++ variable types limits

Question

here is a quite simple question(I think), is there a STL library method that provides the limit of a variable type (e.g integer) ?

Answer 1

Use std::numeric_limits:

// numeric_limits example
// from the page I linked
#include 
#include 
using namespace std;

int main () {
  cout << boolalpha;
  cout << "Minimum value for int: " << numeric_limits::min() << endl;
  cout << "Maximum value for int: " << numeric_limits::max() << endl;
  cout << "int is signed: " << numeric_limits::is_signed << endl;
  cout << "Non-sign bits in int: " << numeric_limits::digits << endl;
  cout << "int has infinity: " << numeric_limits::has_infinity << endl;
  return 0;
}