Cliche problem: 0.1 + 0.2 == 0.3?

assert!(0.1 + 0.2 == 0.3) leads to a panic
while
assert!(0.1_f32 + 0.2_f32 == 0.3_f32) will proceed without any issues

So, an actual implementation shows
0.1 + 0.2 = 0.30000000000000004

Therefore, the following will NOT work
assert!(0.1_f64 + 0.2_f64 == 0.3_f64)

But this will
assert!(0.1_f64 + 0.2_f64 != 0.3_f64)

I think a good chunk of people have heard of this problem before, but it's always nice to have a brain teaser. Hope I spelled that right.