The unordered_set::clear() function is a built-in function in C++ STL which is used to clear an unordered_set container. That is, this function removes all of the elements from an unordered_set and empties it. All of the iterators, pointers, and references to the container are invalidated. This reduces the size of the container to zero.
Parameter: This function does not accepts any parameter.
Return Value: This function does not returns any value.
Below programs illustrate the unordered_set::clear() function:
sampleSet contains: 25 5 10 15 20 Size of set after clearing elemets: 0
sampleSet contains: Welcome To GeeksforGeeks For Geeks Computer Science Portal Size of set after clearing elemets: 0
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