vector insert() function in C++ STL

std::vector::insert() is a built-in function in C++ STL which inserts new elements before the element at the specified position, effectively increasing the container size by the number of elements inserted.

Time Complexity – Linear O(N)

1. Syntax:

vector_name.insert (position, val)

1. Parameter:The function accepts two parameters specified as below:
   • position – It specifies the iterator which points to the position where the insertion is to be done.
   • val – It specifies the value to be inserted.
2. Syntax:

vector_name.insert(position, size, val)

1. Parameter:The function accepts three parameters specified as below:
   • position – It specifies the iterator which points to the position where the insertion is to be done.
   • size – It specifies the number of times a val is to be inserted at the specified position.
   • val – It specifies the value to be inserted.
2. Syntax:

vector_name.insert(position, iterator1, iterator2)

1. Parameter:The function accepts three parameters specified as below:
   • position – It specifies the position at which insertion is to be done in vector.
   • iterator1 – It specifies the starting position from which the elements are to be inserted
   • iterator2 – It specifies the ending position till which elements are to be inserted

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