0x00 Lesson
Swift has several operators that perform comparison, and these work more or less like you would expect in mathematics.
Let’s start with a couple of example variables so we have something to work with:
let firstScore = 6
let secondScore = 4
There are two operators that check for equality
:
== checks two values are the same, and
!= (pronounced “not equals”) checks two values are not the same:
firstScore == secondScore
firstScore != secondScore
There are four operators for comparing whether
one value is greater than
, less than
, or equal to
another. These are just like in mathematics:
firstScore < secondScore
firstScore >= secondScore
Each of these also work with strings, because strings have a natural alphabetical order:
"Taylor" <= "Swift"
0x01 Tips
When comparing booleans you can write if someBoolean
to mean if someBoolean == true
.
0x02 我的小作品
欢迎体验我的作品之一:小笔记-XNote
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