C++ map cbegin() FunctionC++ map cbegin() function is used to return a constant iterator pointing to the first element of the map container. SyntaxNote: A const_iterator is an iterator that points to constant content.ParameterNone Return valueIt returns a const_iterator pointing to the first element of the map. Example 1Let's see a simple example for cbegin() function. Output: a => C++ b => Java c => SQL In the above, cbegin() function is used to return a constant iterator pointing to the first element in the mymap map. Example 2Let's see a simple example to iterate over the map using for-each loop. Output: Room1 = 100 Room2 = 200 Room3 = 300 In the above example, we are using an STL algorithm std::for-each to iterate over the map. It will iterate on each of the map element and call the callback provided by us. Example 3Let's see a simple example to iterate over the map using while loop. Output: 100: Nikita 200: Deep 300: Priya 400: Suman 500: Aman In the above example, cbegin() function is used to return a constant iterator pointing to the first element in the mymap map. Example 4Let's see another simple example. Output: Elements are: 10 + 10 = 20 20 + 20 = 40 30 + 30 = 60 The first element is: {10, 10} In the above example, cbegin() function is used to return an iterator pointing to the first element in the mymap map. Next TopicC++ Map |
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