What is the difference between pair and map?

Question

Programming

Good afternoon. What is the difference between the two containers if they both store the key, value,

Answer 1

pair is a single key -> value pair, map is a collection of key -> value pairs or a hash map in the general sense.
Sometimes it's more efficient to store a small array of pairs than a small collection of maps. Well, for a single map element, using it is clearly not very efficient.