[Term Entry] Swift .contains() method

content/swift/concepts/dictionaries/terms/contains/contains.md

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+---
+Title: '.contains()'
+Description: 'Returns a Boolean value indicating whether the sequence contains the given element.'
+Subjects:
+  - 'Computer Science'
+  - 'Mobile Development'
+Tags:
+  - 'Dictionary'
+  - 'Properties'
+  - 'Arrays'
+CatalogContent:
+  - 'learn-swift'
+  - 'paths/build-ios-apps-with-swiftui'
+---
+
+The **`.contains()`** method returns `true` if an array contains a specified element, and `false` otherwise.
+
+## Syntax
+
+```pseudo
+dictionaryInstance.contains(element)
+```
+
+- `element`: The item to check for in the array. It returns `true` if the item is present, and `false` otherwise.
+
+To check if a dictionary contains a specific key-value pair, the following is used:
+
+```pseudo
+dictionaryInstance.contains{check}
+```
+
+- `check`: A closure that takes a key-value pair `(key, value)` and returns `true` if the pair satisfies the specified condition, and `false` otherwise.
+
+## Example
+
+In the example below, `.contains()` is checking if a particular actor is in an array storing a movie’s cast:
+
+```swift
+let cast = ["Vivien", "Marlon", "Kim", "Karl"]
+print(cast.contains("Marlon"))
+```
+
+This example results in the following output:
+
+```shell
+true
+```