# std::ratio_less_equal

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< cpp‎ | numeric‎ | ratio

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

If the ratio `R1` is less 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_less_equal_v = ratio_less_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_less_equal<std::ratio<1, 2>, std::ratio<3, 4>>::value,
                      "1/2 <= 3/4");

        if (std::ratio_less_equal<std::ratio<10,11>, std::ratio<11,12>>::value)
            std::cout << "10/11 <= 11/12" "\n";

        static_assert(std::ratio_less_equal_v<std::ratio<10, 11>, std::ratio<11, 12>>);

        if constexpr (std::ratio_less_equal_v<std::ratio<10, 11>, std::ratio<11, 12>>)
            std::cout << "11/12 <= 12/13" "\n";
    }

Output:

    10/11 <= 11/12
    11/12 <= 12/13

### See also

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

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