In C++, vectors are dynamic arrays that allow users to store data in a contiguous memory location while pairs are data structures that allow the users to store two heterogeneous values together in the key-value pair. In this article, we are to learn how we can iterate over a vector of pairs in C++.

For Example,

Input:
myVector = <{1: "Geek"}, {2:" for"}, {3:" Geeks"} >
Output:
Vector Elements:
Key: 1,   Value: Geek
Key: 2,   Value: for
Key: 3,   Value: Geeks

Iterate Over a Vector of Pairs in C++

In C++, we can use the range-based for loop to iterate over each element of the vector of pairs. We can then access the first and second data members of each of the pair containers.

C++ Program to Iterator Over a Vector of Pairs

Vector Elements:
Key: 1, Value: Geek
Key: 2, Value: for
Key: 3, Value: Geeks

Time Complexity: O(N) where N is the number of elements present in the vector.
Auxilary Space : O(1)