Grades Checker v2

#include <iostream>
using namespace std;

int main() {

    int g;
    cout << "Enter your grade: ";
    cin >> g;
    if (g>100)
    {
        cout << "Please Enter a Valid Grade!";
        }
    else if (g>=80)
        {
        cout << "Grade: A+";
    }
    else if (g>=70)
    {
        cout << "Grade: A";
        }
        else if (g>=60)
    {
        cout << "Grade: B";
        }
        else if (g>=40)
    {
        cout << "Grade: C";
        }
        else
        {
        cout << "Grade: F";
    }
    return 0;

}