Day 1 – Words & Numbers – 100 Days of SwiftUI

Welcome to the notes from my first day of 100 Days of SwiftUI. In the first lesson I learnt:

A few things stood out to me in the Decimals section.

First thing is that you are not allowed to add Ints and Decimals:

var x = 1
x = 2

var a = 0.1
a = 0.2

var h = a + x // Cannot merge these two types.
// Instead cast them into one type:
var h = Double(x) + a

(Extract from lines 7 through 15 in playground file.)

And you are not allowed to change the type of a variable during its lifespan.

var stringAndInt = "Hello World"
stringAndInt = 7
// We cannot change types during a variables life span even if it is mutable.

(Extract from lines 17 through 19 in playground file.)

Thank you for checking in! 99 more days to go!
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dylan

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