76 lines
1.5 KiB
Markdown
76 lines
1.5 KiB
Markdown
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# Types
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`KCL` defines the following types and keywords the language.
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All these types can be nested in various forms where nesting applies. Like
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arrays can hold objects and vice versa.
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## Boolean
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`true` or `false` work when defining values.
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## Variable declaration
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Variables are defined with the `let` keyword like so:
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```
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let myBool = false
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```
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## Array
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An array is defined with `[]` braces. What is inside the brackets can
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be of any type. For example, the following is completely valid:
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```
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let myArray = ["thing", 2, false]
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```
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If you want to get a value from an array you can use the index like so:
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`myArray[0]`.
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## Object
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An object is defined with `{}` braces. Here is an example object:
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```
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let myObj = {a: 0, b: "thing"}
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```
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We support two different ways of getting properties from objects, you can call
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`myObj.a` or `myObj["a"]` both work.
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## Functions
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We also have support for defining your own functions. Functions can take in any
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type of argument. Below is an example of the syntax:
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```
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fn myFn = (x) => {
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return x
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}
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```
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As you can see above `myFn` just returns whatever it is given.
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## Binary expressions
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You can also do math! Let's show an example below:
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```
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let myMathExpression = 3 + 1 * 2 / 3 - 7
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```
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You can nest expressions in parenthesis as well:
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```
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let myMathExpression = 3 + (1 * 2 / (3 - 7))
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```
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Please if you find any issues using any of the above expressions or syntax
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please file an issue with the `ast` label on the [modeling-app
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repo](https://github.com/KittyCAD/modeling-app/issues/new).
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