【Swift 60秒】22 - Comparison operators

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"

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0x01 Tips

When comparing booleans you can write if someBoolean to mean if someBoolean == true.

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0x02 我的小作品

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