C++ String cbegin() function

by Online Tutorials Library July 22, 2022

C++ String cbegin()

It gives a reference to the first element of the string.

Difference b/w cbegin() and begin()

The only difference between cbegin() and begin() is cbegin() returns the constant iterator pointing to the constant value.

Syntax

Consider a string str. Its syntax would be:

Parameter

This function does not contain any parameter.

Return value

This function returns the reference pointing to the first element of the string.

Example 1

Let’s see a simple example:

  #include<iostream>  #include<string>  using namespace std;  int main()  {  string str = “java tutorial”;  for(int i =str.cbegin();i!=str.end();i++)  cout<<str[i];  return 0;   }  

In this example, string ‘java tutorial’ is displayed using cbegin() function.

Output:

java tutorial

Example 2

Let’s see another simple example:

  #include<iostream>  #include<vector>  #include<iterator>  using namespace std;  int main()  {  vector<int> v;  v.push_back(1);  v.push_back(2);  v.push_back(3);  v.push_back(4);  v.push_back(5);  for(auto i =v.cbegin();i!=v.end();++i)  cout<<*i;  return 0;   }  

Output:

In this example, vector containing integer values are displayed using cbegin().

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