Check out example codes for "swift switch". It will help you in understanding the concepts better.

Code Example 1

for i in 1 ... 100 {
    switch (i % 3, i % 5) {
    case (0, 0):
        print("FizzBuzz")
    case (0, _):
        print("Fizz")
    case (_, 0):
        print("Buzz")
    default:
        print(i)
    }
}

Code Example 2

var x = 1

switch x {
  case 0: // if x = 0
  	print("x = 0")
  case 1: // if x = 1
  	print("x = 1")
  default: // if x is not 0 nor 1
  	print("no x value")
}

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