Swift Arrays

Swift Arrays

Arrays store ordered collections of values of the same type.

Arrays are value types and copy on write.

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Create and Access

Create arrays with literals or initializers.

Access elements by index and use properties like count and isEmpty.

Example

var numbers = [10, 20, 30]
print(numbers[0])         // 10
numbers.append(40)
print(numbers.count)      // 4
print(numbers.isEmpty)    // false

This example creates an array, accesses items, appends, and inspects properties.

Tip: Arrays are value types.

Mutating a copy will not affect the original (copy-on-write semantics).

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Insert and Remove

Modify arrays by inserting and removing elements.

Example

var items = ["A", "B", "C"]
items.insert("X", at: 1)
print(items)
items.remove(at: 2)
print(items)