Why this is false?

Question

#include <iostream>
using namespace std;

int main() {

float f = 0.1;

if (f == 0.1)
{
cout << "True" << endl;
}
else
{
cout << "False" << endl;
}

return 0;
}

Answer 1

Seems c++ casts f to double by adding 4 bytes to the end of f. This bytes can contain any numbers and it entails inequality

Answer 2

hmm try putting an f next to the second 0.1 maybe (0.1f). I'm afraid that because 0.1 is a double while f is a float might have as result a weird implicit conversion

Answer 3

thanks!