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What is type inference in C++?
Type inference or deduction refers to the automatic detection of the data type of an expression in a programming language. It is a feature present in some strongly statically typed languages. In C++, the auto keyword(added in C++ 11) is used for automatic type deduction. For example, you want to create an iterator to iterate over a vector, you can simply use auto for that purpose.
Example
#include<iostream> #include<vector> using namespace std; int main() { vector<int> arr(10); for(auto it = arr.begin(); it != arr.end(); it ++) { cin >> *it; } return 0; }
In the above program, it will automatically get the type std:: vector<int>:: iterator.
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