# std::ratio_greater_equal

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< cpp‎ | numeric‎ | ratio

Defined in header `<ratio>` |  |
template< class R1, class R2 > struct ratio_greater_equal : std::integral_constant<bool, /* see below */> { }; |  | (since C++11)

If the ratio `R1` is greater than or equal to the ratio `R2`, provides the member constant `value` equal true. Otherwise, `value` is false.

### Helper variable template

template< class R1, class R2 > inline constexpr bool ratio_greater_equal_v = ratio_greater_equal<R1, R2>::value; |  | (since C++17)

## Inherited from std::integral_constant

### Member constants

value [static] | true if R1::num * R2::den >= R2::num * R1::den, or equivalent expression that avoids overflow, false otherwise (public static member constant)

### Member functions

operator bool | converts the object to bool, returns value (public member function)
operator() (C++14) | returns value (public member function)

### Member types

Type | Definition
`value_type` | bool
`type` | std::integral_constant<bool, value>

### Example

Run this code

    #include <iostream>
    #include <ratio>

    int main()
    {
        static_assert(std::ratio_greater_equal<
            std::ratio<2, 3>,
            std::ratio<2, 3>>::value, "2/3 >= 2/3");

        if (std::ratio_greater_equal<
            std::ratio<2,1>, std::ratio<1, 2>>::value)
            std::cout << "2/1 >= 1/2" "\n";

        if (std::ratio_greater_equal<
            std::ratio<1,2>, std::ratio<1, 2>>::value)
            std::cout << "1/2 >= 1/2" "\n";

        // Since C++17
        static_assert(std::ratio_greater_equal_v<
            std::ratio<999'999, 1'000'000>,
            std::ratio<999'998, 999'999>> );

        if constexpr (std::ratio_greater_equal_v<
            std::ratio<999'999, 1'000'000>,
            std::ratio<999'998, 999'999>>)
            std::cout << "999'999/1'000'000 >= 999'998/999'999" "\n";

        if constexpr (std::ratio_greater_equal_v<
            std::ratio<999'999, 1'000'000>,
            std::ratio<999'999, 1'000'000>>)
            std::cout << "999'999/1'000'000 >= 999'999/1'000'000" "\n";
    }

Output:

    2/1 >= 1/2
    1/2 >= 1/2
    999'999/1'000'000 >= 999'998/999'999
    999'999/1'000'000 >= 999'999/1'000'000

### See also

ratio_equal (C++11) | compares two `ratio` objects for equality at compile-time (class template)
ratio_less (C++11) | compares two `ratio` objects for less than at compile-time (class template)

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