# Hints ## General - An integer literal can be defined as one or more consecutive digits. ## 1. Define the expected oven time in minutes - You need to define a [function][functions] without any parameters. ## 2. Calculate the remaining oven time in minutes - You need to define a [function][functions] with a single parameter. - You can use and refer to the previously defined item by its name. - The last expression in a function is [automatically returned][return-values] from the function; you don't have to explicitly indicate which value to return. - You can use the [mathematical operator for subtraction][operators] to subtract values. ## 3. Calculate the preparation time in minutes - You need to define a [function][functions] with a single parameter. - You can use the [mathematical operator for multiplicaton][operators] to multiply values. ## 4. Calculate the elapsed time in minutes - You need to define a [function][functions] with two parameters. - You can [call][functions] one of the other functions you've defined previously. - You can use the [mathematical operator for addition][operators] to add values. [functions]: https://doc.rust-lang.org/book/ch03-03-how-functions-work.html [return-values]: https://doc.rust-lang.org/book/ch03-03-how-functions-work.html#functions-with-return-values [operators]: https://doc.rust-lang.org/book/appendix-02-operators.html