C++ String push_back() function

by Online Tutorials Library July 22, 2022

C++ String push_back()

This function is used to add new character ch at the end of the string, increasing its length by one.

Syntax

Consider a string s1 and character ch . Syntax would be :

Parameters

ch : New character which is to be added.

Return value

It does not return any value.

Example 1

Let’s see simple example.

  #include<iostream>  using namespace std;              int main()             {             string s1 = “Hell”;             cout<< “String is :” <<s1<<‘n’;             s1.push_back(‘o’);             cout<<“Now, string is :”<<s1;            return 0;                }   

Example 2

Let’s consider another simple example.

  #include<iostream>  using namespace std;  int main()  {  string str = “java tutorial “;  cout<<“String contains :” <<str<<‘n’;  str.push_back(‘1’);  cout<<“Now,string is : “<<str;  return 0;   }  

Output:

String contains :java tutorial  Now,string is java tutorial 1

Example 3

Let’s see the example of inserting an element at the end of vector.

  #include<iostream>  #include<vector>  using namespace std;  int main()  {  vector<char> s;  s.push_back(‘j’);  s.push_back(‘a’);  s.push_back(‘v’);  s.push_back(‘a’);  for(int i=0;i<s.size();i++)  cout<<s[i];  return 0;  }  

Output:

Java

Next TopicC++ Strings