The insert() method inserts an element to the array at the specified index.
Example
// create a list of vowels
var vowel = ["a", "e", "i", "u"]
// 'o' is inserted at index 3 (4th position)
vowel.insert("o", at: 3)
print(vowel)
// Output: ["a", "e", "i", "o", "u"]
insert() Syntax
The syntax of the array insert() method is:
array.insert(newElement, at: index)
Here, array is an object of the Array class.
insert() Parameters
The insert() method takes two parameters:
- newElement - element to be inserted to array
- index - the index where the element needs to be inserted
insert() Return Value
The insert() method doesn't return any value. It only updates the current array.
Example 1: Swift Array insert()
// create a array of prime numbers
var prime = [2, 3, 5, 7]
// insert 11 at index 4
prime.insert(11, at: 4)
print(prime)
Output
[2, 3, 5, 7, 11]
Example 2: Using insert() With startIndex and endIndex
// create a array of even
var even = [4, 6, 8]
// insert 2 at the starting index
even.insert(2, at: even.startIndex)
// insert 10 at the end
even.insert(10, at: even.endIndex)
print(even)
Output
[2, 4, 6, 8, 10]
Here,
startIndex- inserts element at the starting index i.e. index 0endIndex- inserts element at the end of the array.