How to remove the last character of a string in C++

In this tutorial, we are going to learn about how to remove the last character of a string in C++.

Consider, we have the following string.

string user = "Johnd";

Now, we want to remove the last character d from the above string.

Removing the last character

To remove the last character of a string, we can use the built-in pop_back() function in C++

Here is an example, that removes the last character d from the following string:

#include <iostream>
#include <string.h>
using namespace std;

int main()
{
    string user = "Johnd";
    user.pop_back(); // removes last character
    cout<< user;
    return 0;
}

Output:

"John"

Note: The pop_back() function modifies the original string by removing the last character, instead of creating a new string.

Similarly, we can also use the substr() function in C++ to remove the last character of a string like this.

#include <iostream>
#include <string.h>
using namespace std;

int main()
{
    string user = "Johnd";
    string result = user.substr(0,user.size()-1);
    cout<< result;
    return 0;
}

The substr() function returns a new string with the specified characters instead of modifying the original string.