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Int、Float 与 Bool

使用 Mojo 的数值和布尔类型

Int、Float 与 Bool 是 CoddyKit 上的免费 Mojo Academy 课时。这是第 2 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Mojo Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Mojo Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Values Have Types

Every value belongs to a type that says what it is and what you can do with it. Three core types start you off.

Int for Whole Numbers

An Int holds whole numbers like counts and indexes, with no fractional part at all.

var count = 42

Math with Int

Ints support the usual arithmetic. Add, subtract, and multiply them just as you would expect on whole numbers.

var apples = 3 + 4
print(apples)

Float for Decimals

A Float stores numbers with a decimal point, perfect for measurements, prices, and anything fractional.

var price = 9.99

Int and Float Differ

10 is an Int but 10.0 is a Float. The decimal point is what makes a literal a Float instead of an Int.

var whole = 10
var fraction = 10.0

Float Division

Dividing with / gives a Float result so fractions are not lost. That keeps precision when numbers do not divide evenly.

var half = 5 / 2
print(half)

Bool Is True or False

A Bool holds just one of two values: True or False. It answers yes-or-no questions in your logic.

var is_ready = True

Comparisons Make Bools

Comparing values produces a Bool. The expression 3 > 2 evaluates to True, while 1 == 2 is False.

var bigger = 3 > 2
print(bigger)

Bools Drive Decisions

Bools feed your if-statements later. Storing a comparison in a clearly named Bool makes branching code read well.

var is_adult = age >= 18

Pick the Right Number Type

Use Int when fractions cannot exist, like a head count. Reach for Float when a value can have a decimal.

Three Tools, Many Programs

Int, Float, and Bool already cover counting, measuring, and deciding. Most logic you write leans on these core types.

Quick Check

You write the literal 10.0 instead of 10 in your Mojo code. What type is that value?

Recap

Int counts, Float measures with decimals, and Bool holds True or False. Comparisons produce Bools that steer your logic. 🎯

常见问题解答

「Int、Float 与 Bool」课时是免费的吗？

是的 — 「Int、Float 与 Bool」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Mojo Academy 课程的其余内容，请升级到 CoddyKit PRO。 Mojo Academy 课程共包含 4 节课。

「Int、Float 与 Bool」这节课中我会学到什么？

使用 Mojo 的数值和布尔类型你通过在浏览器中直接运行的动手代码来练习 Mojo Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Mojo Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Mojo Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 2 节课，共 4 节。

「Int、Float 与 Bool」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Mojo Academy 课中编写并运行代码吗？

能。每节 Mojo Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

此课程中的所有课时

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