Why these C++ code output false?

Question

float f = 0.1;
if(f == 0.1)
cout<<“True”;
else
cout<<“False”;

Answer 1

0.1 is a double type value. When you store it in float type which is 4bytes of storage, it is converted and conversion value will have some difference in precision value. So difference in value exists because of floating point conversions..

edit:
my sample test codes, which have more information, in comments. may that helps you understand it clearly.. read once..
hope it helps..

https://code.sololearn.com/c1dvpsoA6aqz/?ref=app
https://code.sololearn.com/cKii0a2b11M9/?ref=app

Answer 2

Thank you for so much information! It is good to know the difference of data structure between float and double type by your programs, mentors are always helpful and powerful in Sololearn community! Really appreciate and sorry for reply late.