array::if_contains (1 of 2 overloads)

Return a pointer to an element, or nullptr if the index is invalid.

value const*
if_contains(
    std::size_t pos) const;

This function returns a pointer to the element at index pos when the index is less then the size of the container. Otherwise it returns null.

if ( auto p = arr.if_contains( 1 ) )
    std::cout << *p;

Constant.

No-throw guarantee.

Name	Description
`pos`	The index of the element to return.