Does casting double to float always return same value?

Question

Does casting double to float always produce same result, or can there be some \"rounding differences\"?

For example, is x in

Answer 1

Considering that they have different precision, even i you're casting from less precision to wider one (I suppose that is actually your doubt) the result can not be always the same.

Floating point operations, especially casting, are always a subject of truncating/rounding and any other type of approximation.