how to remove an element from a vector by value c 2b 2b

1#include <algorithm>
2#include <vector>
3
4// using the erase-remove idiom
5
6std::vector<int> vec {2, 4, 6, 8};
7int value = 8 // value to be removed
8vec.erase(std::remove(vec.begin(), vec.end(), value), vec.end());

1std::vector<int> v; 
2// fill it up somehow
3v.erase(std::remove(v.begin(), v.end(), 99), v.end()); 
4// really remove all elements with value 99

1vector.erase(position) // remove certain position
2// or
3vector.erase(left,right) // remove positions within range
4

1#include<bits/stdc++.h>
2using namespace std;
3int main(){
4    vector<int> v;
5    //Insert values 1 to 10
6    v.push_back(20);
7    v.push_back(10);
8    v.push_back(30);
9    v.push_back(20);
10    v.push_back(40);
11    v.push_back(20);
12    v.push_back(10);
13
14    vector<int>::iterator new_end;
15    new_end = remove(v.begin(), v.end(), 20);
16
17    for(int i=0;i<v.size(); i++){
18        cout << v[i] << " ";
19    }
20    //Prints [10 30 40 10]
21    return 0;
22}
23C++Copy