how to delete a number from vector permanantely code example

Example 1: remove element by index from vector c++

// Deletes the second element (vec[1])
vec.erase(vec.begin() + 1);

// Deletes the second through third elements (vec[1], vec[2])
vec.erase(vec.begin() + 1, vec.begin() + 3);

Example 2: vector erase specific element

vector.erase( vector.begin() + 3 ); // Deleting the fourth element