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.

Samual Sam

Published on 16-Feb-2018 06:52:17

• Related Questions & Answers
• Type Inference in C++
• Type Inference in C++ (auto and decltype)
• Type Inference in Lambda expression in Java?
• Local Variable Type Inference or LVTI in Java 10
• What is type deduction in C++?
• What is Type casting in C#?
• What is Type safe in C#?
• What is Type conversion in C#?
• What is a type cast in C/C++?
• What is data type of FILE in C?
• What is enumerated data type in C language?
• What is the difference between type conversion and type casting in C#?
• What is the type of string literals in C/ C++?
• What is the type specifier for boolean in C++?
• What is JavaScript type coercion?