is_arithmetic Template in C++

Last Updated : 19 Nov, 2018

The std::is_arithmetic templateof C++ STL is used to check whether the given type is arithmetic or not. An Arithmetic type means an integral type or a floating-point type. It returns a boolean value showing the same. Syntax:

template <class T> struct is_arithmetic;

Parameters: This template accepts a single parameter T (Trait class) to check whether T is an arithmetic type or not. Return Value: This template returns a boolean value as shown below:

True: if the type is a arithmetic.
False: if the type is a non-arithmetic.

Below programs illustrate the std::is_arithmetic template in C++ STL: Program 1:

CPP

// C++ program to illustrate
// is_arithmetic template

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

// main program
class GFG {
};

int main()
{
    cout << boolalpha;
    cout << "is_arithmetic:" << '\n';
    cout << "GFG: "
         << is_arithmetic<GFG>::value << '\n';
    cout << "bool: "
         << is_arithmetic<bool>::value << '\n';
    cout << "long: "
         << is_arithmetic<long>::value << '\n';
    cout << "short: "
         << is_arithmetic<short>::value << '\n';
    return 0;
}

Output:

is_arithmetic:
GFG: false
bool: true
long: true
short: true

Program 2:

CPP

// C++ program to illustrate
// is_arithmetic template

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

// main program
class GFG {
};

int main()
{
    cout << boolalpha;
    cout << "is_arithmetic:" << '\n';
    cout << "GFG: "
         << is_arithmetic<GFG>::value << '\n';
    cout << "int: "
         << is_arithmetic<int>::value << '\n';
    cout << "int const: "
         << is_arithmetic<int const>::value << '\n';
    cout << "int &: "
         << is_arithmetic<int&>::value << '\n';
    cout << "int *: "
         << is_arithmetic<int*>::value << '\n';
    cout << "long int: "
         << is_arithmetic<long int>::value << '\n';

    return 0;
}

Output:

is_arithmetic:
GFG: false
int: true
int const: true
int &: false
int *: false
long int: true

Program 3:

CPP

// C++ program to illustrate
// is_arithmetic template

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

// main program
int main()
{
    cout << boolalpha;
    cout << "is_arithmetic:" << '\n';
    cout << "float: "
         << is_arithmetic<float>::value << '\n';
    cout << "float const: "
         << is_arithmetic<float const>::value << '\n';
    cout << "float &: "
         << is_arithmetic<float&>::value << '\n';
    cout << "float *: "
         << is_arithmetic<float*>::value << '\n';
    cout << "double: "
         << is_arithmetic<double>::value << '\n';
    cout << "double const: "
         << is_arithmetic<double const>::value << '\n';
    cout << "double &: "
         << is_arithmetic<double&>::value << '\n';
    cout << "double *: "
         << is_arithmetic<double*>::value << '\n';

    return 0;
}

Output:

is_arithmetic:
float: true
float const: true
float &: false
float *: false
double: true
double const: true
double &: false
double *: false

Program 4:

CPP

// C++ program to illustrate
// is_arithmetic template

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

// main program
int main()
{
    cout << boolalpha;
    cout << "is_arithmetic:" << '\n';
    cout << "char: "
         << is_arithmetic<char>::value << '\n';
    cout << "char const: "
         << is_arithmetic<char const>::value << '\n';
    cout << "char &: "
         << is_arithmetic<char&>::value << '\n';
    cout << "char *: "
         << is_arithmetic<char*>::value << '\n';

    return 0;
}

Output:

is_arithmetic:
char: true
char const: true
char &: false
char *: false

is_class template in C++

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