alchemy-2024-SWIFT

Loops

1. For loop

   for i in 1..<100{
      print(i)
   }
   

[!IMPORTANT] if you dont want the value to be stored then use underscore _

   for _ in 1...3{
      print("***********")
   }

1. looping through arrays

   var Days = ["Mon", "Tue", "Wed" , "Thu", "Fri", "Sat", "Sun"]
   for eachDay in Days{
      print("\(eachDay)day")
   }
   
   

[!IMPORTANT] for index you need to add < so that it can handle out of index error

   // to get the index
   for i in 0..<Days.count{
      print("\(i) : \(Days[i])")
   }

1. Looping through Dictionary

   let Details = ["Name": "Girish", "age": "29"]
   
   for (key,value) in Details {
      print("\(key) - \(value)")
   }
   

2. Break and continue statement

   for num in 0...10{
      if num == 2{
         print("Conitnue for 2")
         continue
      } else if num == 5{
         print("Break at 5")
         break
      } else {
         print(num)
      }
   }
   

3. While loop

   var count= 1
   while count <=5{
      print("count is \(count)")
      count +=1
   }
   

4. Reapeat while loop

   var count = 0
   repeat {
      print("counter is \(count)")
      count += 1
   } while count < 10
   
   

[!TIP] while : iterater 0 or more times
repeat : iterate 1 or more times (similar to do while)

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