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add items to map in c++

mp.insert({ 2, 30 }); 
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c++ insert into map

map<float, float> map1;

//using insert function
map1.insert({ 56.4, 67.2 });

//Using Emplace Function, it increases the size of the map by 1
map2.emplace(3, 78.4);

//using subscript [], it also increases the size of the map by 1
//it always assigns a Null value if a value is not mapped to our key
map3['x'] = 54.3; //x is key
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c++ map insert

  mymap.insert ( std::pair<char,int>('a',100) );
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cpp map insert

std::map<TypeA, TypeB> my_map;	// TypeA key; TypeB value
my_map.insert({ key, value }); 	// insert elements in random order
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c++ insert hashmap

// initialize container
    map<int, int> mp;
 
    // insert elements in random order
    mp.insert({ 2, 30 });
    mp.insert({ 1, 40 });
    mp.insert({ 3, 60 });
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