A bit confused...

Question

So my understanding of the question is to extract odd numbers over a range of 1...100 I do not remember going over anything like this in the video ?
```operators.swift
var results: [Int] = []
for n in 1...100 {
    // Enter your code below
// End code 
}
```

Jonathan Ruiz · Accepted Answer

Hi Andres this one is more of a logic problem. You know you have to take out Int values that are odd, and translate that  to code. You have to use the logical operators. 
```swift 
if  (n % 2 != 0) {
    print("this means that n is an odd number")
} else {
   print("the number is even")
}
```
To see if a number is odd you take the number and use the modulo operator % to see if you get a remainder. To check if a number is odd you want to see if there is a remainder after dividing by 2. For the second part of this you have != 0. This is checking to see if the remainder is not 0. The symbol == is used to see if two values are equal and using an exclamation mark means not or the inverse of what comes after. 
```swift 
!true  // this really means false 
!false // this really means true 
1 == 1 // you are checking to see if the value on each side is equal, this would print true 
1 != 1 // you are saying these value on the left is not equal to the value on the right, would print false since 1 is equal to 1
```
Also when you use the modulo operator in a Xcode playground and you see 0 come up on the side tab it means the numbers are perfectly divisible. That will help you in other challenges when you need to see if a number is divisible by another.

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Andres Lopez

Andres Lopez

A bit confused...

1 Answer

Jonathan Ruiz

Jonathan Ruiz