C++ Usage and example of vector pop_back()

C++ Vector (Container)

It deletes the last element and reduces the size of the vector (vector) by one.

Syntax

Vector (vector) v. Syntax is:

v.pop_back();

Parameters

It does not contain any parameters.

Return value

It does not return any value.

The following figure shows how the pop_back() function works:

The following figure shows how to use the pop_back() function to delete the last element of a vector (vector).

Example

Let's see a simple example.

Example

#include<iostream>
#include<vector>
using namespace std;
int main()
{
　　　　vector<string> v{"welcome","to","www.oldtoolbag.com","tutorial"};
　　　　cout<<"Initial string is :";
　　　　for(int i=0; i<v.size(); i++{
　　　　　　　　cout << v[i] << " \t";
　　　　}
　　　　cout<<'\n';
　　　　cout << "After deleting the last string, the string becomes:\";
　　　　v.pop_back();
　　　　for(int i = 0; i < v.size(); i++{
　　　　　　　　cout << v[i] << " \t";
　　　　}
　　　　return 0;
}

Output:

The initial string is: welcome to www.oldtoolbag.com tutorial　
After deleting the last string, the string becomes: welcome to www.oldtoolbag.com

In this example, the last string is deleted using the pop_back() function.

C++ Vector (Container)