Control structures: switch - 12

- Andrés Cruz

En español
Control structures: switch - 12

Without a doubt, the conditional structure, that is, the if, is the most used control structure today; but as you can see, when you have multiple conditions, a conditional becomes impractical; due to the poor readability of the code for these cases, there is a structure called switch which allows grouping a set of expressions in a more simplified way:

switch(day) {
  case 1: weekday = "Monday."; break;
  case 2: weekday = "Tuesday."; break;
  case 3: weekday = "Wednesday."; break;
  case 4: weekday = "Thursday."; break;
  case 5: weekday = "Friday."; break;
  case 6: weekday = "Saturday."; break;
  case 7: weekday = "Sunday."; break;
}

As you can see, instead of evaluating repeated conditions for the same entity, we simply place the value, which can be anything and as complex as you want; In this case we are simply evaluating what day it is from a numerical representation of the day of the week; but maybe you are interested in evaluating texts, booleans, or complex conditions like the one we covered in previous videos.

The use of break may sound a bit familiar to you; which, as its name indicates, is a reserved word that we can use to break with the rest of the execution of the block or in this more specific case with the control structure; Therefore, when a match is found for the value we are comparing, the execution of the rest of the switch block will simply stop.

Andrés Cruz

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