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template< class T > valarray<T> sqrt( const valarray<T>& va );

For each element in va computes the square root of the value of the element.

va
,
:
value array to apply the operation to
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Value array containing square roots of the values in va.

(sqrt) . , std::sqrt .
:
Unqualified function (sqrt) is used to perform the computation. If such function is not available, std::sqrt is used due to argument dependent lookup.
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std::valarray. , :
:
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
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  • const - std::valarray .
    :
    All const member functions of std::valarray are provided.
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  • std::valarray, std::slice_array, std::gslice_array, std::mask_array std::indirect_array .
    :
    std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.
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  • , const std::valarray& .
    :
    All functions accepting a arguments of type const std::valarray& should also accept the replacement type.
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  • const std::valarray& const std::valarray& .
    :
    All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.
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template<class T>
valarray<T> sqrt(const valarray<T>& va)
{
    valarray<T> other = va;
    for (T &i : other) {
        i = sqrt(i);
    }
    return other;
}


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