C++ multiset begin()
C++ multiset begin() function is used to return an iterator referring to the first element of the multiset container.
Syntax
Parameter
None
Return value
It returns an iterator pointing to the first element of the multiset.
Complexity
Constant.
Iterator validity
No changes.
Data Races
The container is accessed. Neither the constant nor the non-constant versions modify the container.
Exception Safety
This function never throws exceptions.
Example 1
Let’s see the simple example for begin() function:
Output:
Contents of mymultiset are: C++ C++ Java SQL
In the above example, begin() function is used to return an iterator pointing to the first element in the mymultiset multiset.
Example 2
Let’s see a simple example:
Output:
0 2 2 4 5 5
Example 3
Let’s see a simple example to iterate over the multiset using while loop:
Output:
Elements of mymultiset are: Aman Deep Nikita Nikita Priya Suman
In the above example, begin() function is used to return an iterator pointing to the first element in the mymultiset multiset.
Example 4
Let’s see a simple example:
Output:
The first element of s1 is 1 The first element of s1 is now 2
In the above example, begin() function is used to return an iterator pointing to the first element in the mymultiset multiset.