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How to Use a Range-Based for Loop with a Vector in C++?

C++ introduced the range-based for loop as a convenient way to iterate over elements in a container. In this article, we’ll look at how to iterate over a vector using a range-based loop in C++.

Example

Input:
myVector: {1, 2, 3, 4, 5}

Output:
1 2 3 4 5

Range-Based for Loop with Vector in C++

The syntax of range-based for loop is:

for (const auto &element : container_name) {
    // Code to be executed for each element
}

We can use this syntax with our vector to iterator over each element.

C++ Program to Print Vector Using Range-Based for Loop

C++

// C++ Program to Iterate Over Elements in a Vector Using a
// Range-Based For Loop
  
#include <iostream>
#include <vector>
  
using namespace std;
  
int main()
{
    // Declare and initialize a vector
    vector<int> vec = { 10, 20, 30, 40, 50 };
  
    // Use a range-based for loop to iterate over elements
    // in the vector
    for (const auto& num : vec) {
        cout << num << " ";
    }
  
    return 0;
}

Output

10 20 30 40 50

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


 


Reffered: https://www.geeksforgeeks.org

C++

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Type:
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Category:
 Coding
Sub Category:
 Tutorial
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