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iOS

Posted by Nicklas Lind
Nicklas Lind
3,619 Points

How do I solve the Fahrenheit to Celcius challenge?

Hello,

After completing the "Operators" part of the "Swift basics" course, a bonus challenge is presented:

"Using the math operators taught in this stage create a formula to change any given temperature from Fahrenheit to Celsius."

I've tried to solve this in Swift by writing this code:

let celcius = 20 let fahrenheit = (1.8 * celcius) + 32

(I don't know how to properly include code examples)

It's doesn't work, and I think it has something to do with the order of which the code is being "calculated" (The multiplication is not being applied).

How do I solve this challenge? :)

Thanks in advance,

Nicklas

6 Answers

taha yassine hammi
taha yassine hammi
1,220 Points

You have to change "celsius" to a float number like this :

let celsius = 20.0

let fahrenheit = (1.8 * celsius) + 32

println(celsius)

Nicklas Lind
Nicklas Lind
3,619 Points

I did it! Thank you!

The code looks like this:

let celcius: Float = 20.0
var fahrenheit: Float; (1.8 * celcius) + 32
mamat golo
PLUS
mamat golo
Courses Plus Student 3,755 Points
mamat golo
mamat golo
Courses Plus Student 3,755 Points

try this formula :

let fahrenheit = 20 as Int
let celsius = (fahrenheit-32)*5/9 as Int
println(celsius)
Nicklas Lind
Nicklas Lind
3,619 Points

I still can't get it to work. What do you mean by "as Int"? Like in:

let fahrenheit: int = 20?

I've tried to convert the other way around (since I am Danish): http://imgur.com/mRpMZ01

It still does not work. Would be happy to learn from it just by getting the result and a short explaination.

Thank you!

Mohd Maqbool Alam
.a{fill-rule:evenodd;}techdegree
Mohd Maqbool Alam
Full Stack JavaScript Techdegree Student 5,715 Points

int means integer and float means decimal point number

Devon Archibald
Devon Archibald
2,138 Points
Devon Archibald
Devon Archibald
2,138 Points

let fahrenheit = 32

let celsiusConversion = Double(fahrenheit - 32) * 5 / 9

// The answer will be calculated be changing the value/temperature assigned to constant fahrenheit. Remember we are asked to convert from fahrenheit to celsius.

James Richardson
James Richardson
2,823 Points
James Richardson
James Richardson
2,823 Points

Here's my version:

import UIKit

var currentTemperature = 45.0

let celsiusMultiplier = 1.8

var Celsius = (currentTemperature - 32) / celciusMultiplier

print(celsius)

JIHOON JUNG
JIHOON JUNG
10,927 Points
JIHOON JUNG
JIHOON JUNG
10,927 Points

My version Formula Fahrenheit to Celsius F = (C x 2) + 30

let Celsius1 = 10.0 let Fahrenheit1 = (Celsius1 * 2) + 30 let fahrenheitLetter = "F" println("(Fahrenheit1)(fahrenheitLetter)")

Formula Celsius to Fahrenheit C = (F-32) X 5/9

let Fahrenheit2 = 50.0 let Celsius2 = (Fahrenheit2-32) * 5/9 let celsiusletter = "C" println("(Celsius2)(celsiusletter)")

kols
kols
27,007 Points
kols
kols
27,007 Points

Extra Credit: Using the math operators taught in this stage create a formula to change any given temperature from Fahrenheit to Celsius. Formula for conversion: T(°C) = (T(°F) - 32) / 1.8

var fTemp = 72
var cTemp = Double(fTemp - 32) / 1.8
println(cTemp)