C++ String begin

This function provides a reference to the initial element.

Syntax

Consider a string 's' and iterator 'it'. The syntax is as follows:

iterator it = s.begin();

Parameter

This function does not contain any parameter.

Return value

This function does not return any value.

Example 1

Let's see the simple example of begin function.

#include<iostream>
using namespace std;
int main()
{
	string str="Hello";
	cout<<*str.begin();
	return 0;
}

Output:

This illustration demonstrates how to retrieve the initial character of a string by utilizing the begin function.

Example 2

Let's see the another example.

#include<iostream>
using namespace std;
int main()
{
	string str ="B language";
	*str.begin()='C';
	cout<<str;
	return 0;
}

Output:

C language

This example demonstrates how to change the initial character of a string by utilizing the begin function.

Example 3

Let's explore a basic example of an array class where we can utilize the begin function.

#include<iostream>
#include<array>
using namespace std;
int main()
{
	array<int,6> myarray={1,2,3,4,5,6};
	for (int i=myarray.begin();i<myarray.end();i++)
	{
		cout<<*myarray;
	}
	return 0;
}

Output:

123456

In this instance, a collection of whole numbers has been traversed utilizing the start function.