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C++ String begin()This function gives a reference to the first element. SyntaxConsider a string 's' and iterator 'it'. Syntax would be: iterator it = s.begin(); ParameterThis function does not contain any parameter. Return valueThis function does not return any value. Example 1Let's see the simple example of begin() function. #include<iostream> using namespace std; int main() { string str="Hello"; cout<<*str.begin(); return 0; } Output: H This example shows how to get the first character of string using begin() function. Example 2Let'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 shows how to replace the first character of string using begin function. Example 3Let's see simple example of array class to apply 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 example, array of integers have been iterated using begin function.
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