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numeric_limits::max_exponent10

Returns the maximum positive integral exponent that the floating-point type can represent as a finite value when a base of ten is raised to that power.

static const int max_exponent10 = 0;

The maximum integral base 10 exponent representable by the type.

The member function return is meaningful only for floating-point types. The max_exponent is the value FLT_MAX_10 for type float.

// numeric_limits_max_exponent10.cpp
// compile with: /EHsc
#include <iostream>
#include <limits>

using namespace std;

int main( )
{
   cout << "The maximum base 10 exponent for type float is:  "
           << numeric_limits<float>::max_exponent10
           << endl;
   cout << "The maximum base 10 exponent for type double is:  "
           << numeric_limits<double>::max_exponent10
           << endl;
   cout << "The maximum base 10 exponent for type long double is:  "
           << numeric_limits<long double>::max_exponent10
           << endl;
}
The maximum base 10 exponent for type float is:  38
The maximum base 10 exponent for type double is:  308
The maximum base 10 exponent for type long double is:  308

Header: <limits>

Namespace: std

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