What is array.capacity in Swift?

Overview

In Swift, capacity is a property of an array. It gets the total number of elements that the array can contain without allocating new storage.

Syntax

arr.capacity

Parameters

This method takes no parameter.

Return Value

It returns an integer value.

Example

// create arrays
var gnaam = ["Google", "Netflix", "Amazon", "Apple", "Facebook", "Meta"];
var letters = ["a", "b", "c", "d", "e"];
var numbers = [1, 2, 3];
// print number of elements
print(gnaam.capacity);
print(letters.capacity);
print(numbers.capacity);

Explanation

  • Lines 2–4: We create the arrays gnaam, letters, and numbers.
  • Line 7–9: We print the number of elements each array can contain without allocating new storage using the capacity property of arrays.

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