=====begin=====
Syntax:

<code>
    #include <set>
    iterator begin();
    const_iterator begin() const;
</code>

The function begin() returns an iterator to the first element of the set. begin
() should run in [[/complexity|constant time]].

For example, the following code uses begin() to initialize an iterator that is
used to enumerate a set:

<code>
     // Create a set of characters
     set<char> charSet;
     const char* s = "Hello There";
     for( int i=0; i < strlen(s); i++ ) {
       charSet.insert( s[i] );
     }
     // Display the set
     set<char>::iterator theIterator;
     for( theIterator = charSet.begin(); theIterator != charSet.end(); theIterator++ ) {
       cout << *theIterator;
     }
     // output is " HTehlor"
</code>

Related Topics: [[end]], [[rbegin]], [[rend]]