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

Posted by Mackenzie Milroy
Mackenzie Milroy
3,162 Points

I need help with this if statement :(

I don't understand how to check for multiples of 7 and if they're odd using the "!" operator, please guide me through setting this up correctly.

operators.swift 
var results: [Int] = [7,21,35,49,63,77,91]
var multiples: [Int] =[7,14,21,28,35,42,49,56,63,70,77,84,91,98]
for n in 1...100 {
    // Enter your code below
    if results && multiples {
    print("not even")
    }
    // End code 
}

1 Answer

james south
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points
james south
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points

you use the modulo operator %. modulo returns the remainder of division. when numbers evenly divide, there is no remainder and modulo returns 0. if a number % 2 is 0, it is even. if 1, odd. here it looks like they specifically want you to use the not operator ! so a !0 from a % operation would be an odd number. for the 7s, it works the same way. if a number mod 7 is 0, dividing the number by 7 leaves no remainder and thus the number is evenly divisible by 7.