Help please. This question is confusing

Question

float f1=0.1
If (f1==0.1)
printf("Equal")
else
printf("unequal")

Answer was "unequal"

Answer 1

Float precision numbers are stored differently than double precision numbers, therefore they won't be equal. They would be equal if:

f1 was a double:
double f1 = 0.1;
if (f1 == 0.1)
...

It was compared to a float:
if (f1 == 0.1f)
...