all data in the arithmetic expressions should have the same type

see when we add float number to an integer number

Line 4: Char 40: error: cannot add {integer} to f64 ([solution.rs](<http://solution.rs/>))
|
4 |         let fahrenheit = celsius * 1.8 + 32;
|                                        ^ no implementation for f64 + {integer}
|
= help: the trait Add<{integer}> is not implemented for f64