Is it possible to break constantness of constant value in c and c++? [duplicate]

This question already has an answer here:

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• Why const_cast is not modifying the value in caller function? 1 answer

my code is as:-

enter code here
#include<iostream>
int main(){
const int i=10;
std::cout<<i<<"\n";
const_cast<int &>(i)=20;//trying to cast constantness of i.
std::cout<<i<<"\n";
}

This not giving me any error but the value of i is unchanged in output i.e.10. What mistake im performing in above code.