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Showing content from https://cplusplus.com/reference/type_traits/is_floating_point/ below:

class template

<type_traits>

std::is_floating_point

template <class T> struct is_floating_point;

Is floating point

Trait class that identifies whether T is a floating point type.

It inherits from integral_constant as being either true_type or false_type, depending on whether T is a floating point type:

fundamental floating point types float double long double

All fundamental floating types (along with their aliases) are considered floating point types by this class, no matter their const or volatile qualification.

Template parameters

T: A type.

Member types Inherited from integral_constant:

Member constants Inherited from integral_constant:
member constant definition value either true or false
Member functions Inherited from integral_constant:

operator bool: Returns value (public member function)

Example

// is_floating_point example
#include <iostream>
#include <type_traits>

int main() {
  std::cout << std::boolalpha;
  std::cout << "is_floating_point:" << std::endl;
  std::cout << "int: " << std::is_floating_point<int>::value << std::endl;
  std::cout << "float: " << std::is_floating_point<float>::value << std::endl;
  std::cout << "const double: " << std::is_floating_point<const double>::value << std::endl;
  return 0;
}

Output:

is_floating_point:
int: false
float: true
const double: true