Difference between const and final in Dart • Even though both const and final cannot be reassigned, there is a subtle difference between them. • const variables are used for compile-time constants whereas final variables are used for run-time constants.

const current_time = new DateTime.now() // DON'T do it as the value is computed at run time
const name = 'Rahul' // DO it as the value is known at compile time

• When reading from database or reading from a file, the values won't be known at compile time. Use final in such cases