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

Posted by jeehry
jeehry
11,575 Points

Help. I'm stuck on this challenge. Why won't the following work?

if n % 2 == 1 && n * 7 == 0 { results.append(n) }

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

for n in 1...100 

    // Enter your code below
    if n % 2 == 1 && n * 7 == 0 {
results.append(n)
    }

    // End code

2 Answers

doesitmatter
doesitmatter
12,885 Points
doesitmatter
doesitmatter
12,885 Points

Hi Jane Rhee,

// Enter your code below
    if n % 2 == 1 && n * 7 == 0 {
results.append(n)
    }

What you're saying here is if n is odd and n times 7 equals 0 then append the value of n to list. But n times 7 will never be 0 unless if n is 0 and this is not what they asked in the assignment. They wanted you to also append any multiple of 7.

Hint: if n % 2 == 0 then n is a multiple of 2.

You can apply the same logic to figure out how to know if something is a multiple of 7.

Good luck!

jeehry
jeehry
11,575 Points

the code was rewritten and i'm still stumped. I am wondering if the problem lies in the writing of appending the results of values? I want to write: if n is odd && if n is a multiplier of 7 then append the results values.

var results: [Int] = []

for n in 1...100 { // Enter your code below

if n % 2 !=0 && n % 7 == 0 { results.append(n) }

doesitmatter
doesitmatter
12,885 Points

I checked your answer:

var results: [Int] = []

for n in 1...100 {
    if n % 2 != 0 && n % 7 == 0 { 
      results.append(n) 
    }
}

It is correct.

jeehry
jeehry
11,575 Points
jeehry
jeehry
11,575 Points

ah! thank you for your help on this one! the code was not running because of a missing bracket somewhere in there, but I figured it out & the code finally passed. thanks again! :)