Std :: is_signed is a name used in C++ as a predicate from its library traits and it is also used to define the standard library expectations. It is one concept of c++ library that is not enforced but gives a requirement for algorithms.
For example, let’s take Y as an arithmetic type which gives a constant value that is true if Y (-1) <Y (0). The integer is a floating type that points to the signed integer types. If another integer type is not within the range of the signed integer will be unassigned in the bool. Whenever a program is made that adds other specializations will give error message for is _signed since the integer used is undefined.
Int main ()
Std ::cout<<std:: is_signed <A>::value<< ‘\n’;
Std ::cout<<std::<<std::is signed<unsigned int()<< ‘n\’;
Here, if A is signed arithmetic type makes the statement true and it will be false if otherwise. The member constant will convert the arithmetic signed to object bool and returns a value.
Hope this helps.