std::array<T,N>::max_size

constexpr size_type max_size() const noexcept;		(since C++11)

Returns the maximum number of elements the container is able to hold due to system or library implementation limitations, i.e. std::distance(begin(), end()) for the largest container.

Parameters

(none)

Return value

Maximum number of elements.

Complexity

Constant.

Notes

Because each std::array<T, N> is a fixed-size container, the value returned by max_size equals N (which is also the value returned by size)

Example

Run this code

#include <iostream>
#include <array>
 
const char* separate(unsigned long long n)
{
    static char buf[64];
 
    int i{sizeof(buf) - 1}, j{};
    buf[i] = '\0';
 
    do {
        buf[--i] = '0' + (n % 10);
        if (j++ % 3 == 2)
            buf[--i] = '\'';
    } while (n /= 10);
 
    return buf + i + (buf[i] == '\'' ? 1 : 0);
}
 
int main()
{
    std::array<char, 10> s;
    std::cout << "Maximum size of the 'array' is " << separate(s.max_size()) << "\n";
}

Output:

Maximum size of the 'array' is 10

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