How to remove a key from map in C++?

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#include<iostream>
#include<bits/stdc++.h>

int main() {
    std::map<int, std::string> m;

    m[1] = "C++";
    m[2] = "Java";
    m[3] = "PHP";

    // Output: 3
    std::cout << m.size() << std::endl;

    // Remove a key 2 from map
    m.erase(2);

    for (const auto &p: m) {
        std::cout << p.first << '\t' << p.second << std::endl;
    }
    // Output:
    // 1   C++
    // 3   PHP
    
    return 0;
}

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#include <iostream>
#include <map>

int main() {
    std::map<int, std::string> myMap = {{1, "one"}, {2, "two"}, {3, "three"}};
    int keyToRemove = 2;

    // Find the element to remove using the find() method
    auto it = myMap.find(keyToRemove);

    // Check if the element was found
    if (it != myMap.end()) {
        // Remove the element using the erase() method
        myMap.erase(it);
        std::cout << "Element with key " << keyToRemove << " removed from map." << std::endl;
    } else {
        std::cout << "Element with key " << keyToRemove << " not found in map." << std::endl;
    }

    return 0;
}