Ch 6 Silver challenge FIZZ BUZZ bonus portion using tuple in switch

Swift Programming (3rd Edition) 6. Loops
1

For the bonus portion of the Chapter 6 Silver challenge I used three values in the tuple for the switch statement. By the way the value I is printed beside the FIZZ, BUZZ, FIZZBUZZ. Maybe someone might find this useful.

for i in 1…100
{

var valuethree : Int = 0
var valuefive : Int = 0
var valThreeFive : Int = 0


if (i % 3 == 0 && i % 5 == 0)
{
    valThreeFive = i
}
else if (i % 3 == 0)
{
    valuethree = i
}
else if (i % 5 == 0)
{
    valuefive = i
}

let matches = (valThreeFive, valuethree, valuefive)

switch matches
{
case (valThreeFive, _, _) where valThreeFive == i:
    print("\(i)FIZZBUZZ")
case(_, valuethree, _) where valuethree == i:
    print("\(i)FIZZ")
case(_,_, valuefive) where valuefive == i:
    print("\(i)BUZZ")
default:
    print(i)
}

}

1 Like
2

That’s a rather convoluted way of using a switch statement to solve this problem. There are really only two things the switch statement needs to look at: whether i is a multiple of 3 and whether i is a multiple of 5. So your tuple only needs two boolean values indicating whether those two things are true or false. Your switch statement simply checks the 4 combinations of true/false values for the tuple:

for i in 1...100
{
    let multipleOfThree : Bool = (i % 3 == 0)
    let multipleOfFive : Bool = (i % 5 == 0)

    let matches = (multipleOfThree, multipleOfFive)

    switch matches
    {
    case (true, true) : print("FIZZBUZZ")
    case (true, false) : print("FIZZ")
    case (false, true) : print("BUZZ")
    case (false, false) : print(i)
    }
}

Or, just eliminate the variables entirely:

for i in 1...100
{
    switch (i % 3 == 0, i % 5 == 0)
    {
    case (true, true) : print("FIZZBUZZ")
    case (true, false) : print("FIZZ")
    case (false, true) : print("BUZZ")
    case (false, false) : print(i)
    }
}
2 Likes
3

Here is my code solving the two bonus!

// FIZZ BUZZ with for
for i in 1...100 {
    if i % 3 == 0, i % 5 == 0 {
        print("FIZZ BUZZ")
    } else if i % 3 == 0{
        print("FIZZ")
    } else if i % 5 == 0 {
        print("BUZZ")
    } else {
        print(i)
    }
}

// FIZZ BUZZ with Switch
for i in 1...100 {
    let conditions = (i % 3 == 0, i % 5 == 0)
    switch conditions {
    case (true, true):
        print("FIZZ BUZZ")
    case (true, _):
        print("FIZZ")
    case (_, true):
        print("BUZZ")
    default:
        print(i)
    }
}