Skip to content
Related Articles

Related Articles

Improve Article

std::string::clear in C++

  • Difficulty Level : Basic
  • Last Updated : 06 Jul, 2017

The string content is set to an empty string, erasing any previous content and thus leaving its size at 0 characters.
Parameters: none
Return Value: none

void string ::clear ()
- Removes all characters (makes string empty)
- Doesn't throw any error
- Receives no parameters and returns nothing

// CPP code to illustrate
// clear() function
#include <iostream>
#include <string>
using namespace std;
// Function to demo clear()
void clearDemo(string str)
    // Deletes all characters in string
    cout << "After clear : ";
    cout << str;
// Driver code
int main()
    string str("Hello World!");
    cout << "Before clear : ";
    cout << str << endl;
    return 0;


Before clear : Hello World!
After clear : 

Related Article:
This article is contributed by Sakshi Tiwari. If you like GeeksforGeeks (We know you do!) and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Want to learn from the best curated videos and practice problems, check out the C++ Foundation Course for Basic to Advanced C++ and C++ STL Course for foundation plus STL.  To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.
My Personal Notes arrow_drop_up
Recommended Articles
Page :