Why it is 'not equal'?

Question

https://code.sololearn.com/clPjyGdRHK0K/?ref=app

Answer 1

u need to write
f1 = 0.1f

if(f1 == 0.1f)

Answer 2

It's a bit complicated, but float gets converted to double and becomes a slightly different down the line.
When working with floats, add 'f' at the end of numbers, i.e.: 0.1f. That way it won't be converted back and forth and cause issues like that.