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

Question

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 
}

Answer 1 · 2017-01-24T06:18:28Z

January 24, 2017 6:18am

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
}

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Cameron D

Cameron D

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

1 Answer

David Papandrew

David Papandrew