Swift arrays and common methods detailed explanations

// Create an integer arrayvar array1: [Int] = [] // []
var arrya2: Array<Int> = [1, 2, 3] // [1, 2, 3]
var arryaInt = [1, 2, 3] // [1, 2, 3]
var array3 = Array(arrayLiteral: 1, 2, 3) // [1, 2, 3]

var array4 = Array(repeating: "swift", count: 3) // ["swift", "swift", "swift"]
var array5 = Array(repeating: 1001, count: 3) // [1001, 1001, 1001]

// Add 2 arrays of the same typevar array6 = [1, 2, 3] + [4, 5, 6] // [1, 2, 3, 4, 5, 6]

// When the array is declared to be variable, you can use methods such as adding, deleting, and modifying. Constant arrays cannot be modified related operations.var array = [1, 2, 3, 4, 5, 6, 7, 8]
print() // 8

// Determine that the array is an empty arrayif  {
    print("array is empty")
} else {
    print("array is not empty")
}

// Access elements through subscriptvar ele = array[1] // 2

// Intercept new arrayvar subArray = array[1...2] // [2, 3]

// Get the first elementvar firstEle =  // 1

// Get the last elementvar lastEle =  // 8

// Modify the elements corresponding to the subscriptarray[1] = 22
array // [1, 22, 3, 4, 5, 6, 7, 8]

// Modify elements in the specified rangearray[0...2] = [1, 2, 3] // [1, 2, 3]
 
// Append a single element(9) // [1, 2, 3, 4, 5, 6, 7, 8, 9]

// Add a set of elements(contentsOf: [10, 11, 12]) // [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

// Insert a single element at the specified location(0, at: 0) // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

// Insert a set of elements at the specified location(contentsOf: [-3, -2, -1], at: 0) // [-3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

// Remove the specified element(at: 1) // -2

// Remove a set of elements(0...2) // [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

// Remove the first element() // 1

// Remove the end element() // 12

// Remove the first few elements(3) // [5, 6, 7, 8, 9, 10, 11]

// Remove the last elements(3) // [5, 6, 7, 8]

// Replace elements in the specified range(0...3, with: [1, 2, 3, 4]) // [1, 2, 3, 4]

// Determine that the specified element is includedif (3) {
    print("array contains 3")
}

// Remove all elements() // []

var sortArr = [2, 1, 3, -1]

//Sorting from small to large(by: <) // [-1, 1, 2, 3]

// Sort from large to small(by: >) // [3, 2, 1, -1]

// Get the maximum value of the array() // -1

// Get the minimum value of the array() // 3

let arr = [11, 22, 33]

for item in arr {
    print(item)
}

// Print the subscript and corresponding elements of the arrayfor item in () {
    print(item) // (offset: 0, element: 11) (offset: 1, element: 22) (offset: 2, element: 33)
}

// Subscript traversalfor index in  {
    print(arr[index])
}