please write this in swift

The name of the function: convertMilesToKilometers

The function has one parameter that receives the number of miles as a Double.

The parameter requires no argument label when the function is called and has a parameter name of miles.

The function returns a Double that is the number of kilometers.

Note that 1 mile is 1.60934 kilometers. To calculate the number of kilometers, multiply the number of miles by 1.60934.

output

// program asks for the amount of miles

how many miles?:

// user inputs how many

user input: 1

// program prints out answer

1.60934 kilometers