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iOS Swift Collections and Control Flow Control Flow With Conditional Statements Working With Logical Operators

How do i correctly use the logical operators to check if the number is not even and is a multiple of 7?

I feel like i overcomplicated the code but i don't know another way to answer it.

operators.swift
var results: [Int] = []

for n in 1...100 {
    // Enter your code below
    if n = (%(n/2) = 0) && (n/7 = 1...100) {
      results += 1
    }
    // End code 
}

1 Answer

David Papandrew
David Papandrew
8,386 Points

Your instinct to use the modulo operator is correct.

Here's how to properly write the two conditions.

The first condition is looking for non-even numbers. You can do this by using modulo and dividing by 2. If n is even result of the operation will be 0. Since you don't want an even number, we opt for an expression that says "if n % 2 is NOT equal to 0".

For the second condition you want to see if n is a multiple of 7. Again the modulo operator is necessary. Here we will look for n % 7 to be equal to 0.

Assuming n meets these two conditions, we can then use the append method to add the "n" value we are evaluating to our array: results.append(n)

Here is the code:

var results: [Int] = []

for n in 1...100 {
    // Enter your code below
    if n % 2 != 0 && n % 7 == 0 {
        results.append(n)
    }
    // End code
}