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Swift Program to Sort the Elements of an Array in Descending Order
In this article, we will learn how to write a swift program to sort the elements of an array in descending order. To sort the elements of an array Swift provides an in-built function named sort(by:). This function takes one argument and then sorts the array according to the condition passed in the by parameter. So to sort the array in descending order we pass > in the by the parameter of the sort(by:) function.
Syntax
func sort(by:)
Here sort(by:) is an instance method. Which will sort the given sequence according to the value of by: parameter. Here if you want to sort an array in descending order then pass the > operator Or if you want to sort an array in ascending order then pass < operator as a parameter.
Algorithm
Step 1 − Create an array.
Step 2 − Sort the array in descending order using the sort(by:) method −
Array1.sort(by:>)
Step 3 − Print the output
Example
In the following example, we pass > in the by the parameter of the sort(by:) function to sort the given arrays into descending order. This function can sort an array of any data type.
import Foundation
import Glibc
// Creating arrays
var Array1 : [String] = ["bus", "car", "bicycle", "bike"]
var Array2 : [Int] = [23, 56, 7, 5, 84, 2]
var Array3 : [Float] = [3.4, 67.3, 1.2, 5.6, 78.3]
// Sorting the array in descending order
// Using sort(by:) method
print("Before Sorting Array 1 is:", Array1)
Array1.sort(by:>)
print("After Sorting Array 1 is", Array1)
print("\nBefore Sorting Array 2 is:", Array2)
Array2.sort(by:>)
print("After Sorting Array 2 is", Array2)
print("\nBefore Sorting Array 3 is:", Array3)
Array3.sort(by:>)
print("After Sorting Array 3 is", Array3)
Output
Before Sorting Array 1 is: ["bus", "car", "bicycle", "bike"] After Sorting Array 1 is ["car", "bus", "bike", "bicycle"] Before Sorting Array 2 is: [23, 56, 7, 5, 84, 2] After Sorting Array 2 is [84, 56, 23, 7, 5, 2] Before Sorting Array 3 is: [3.4, 67.3, 1.2, 5.6, 78.3] After Sorting Array 3 is [78.3, 67.3, 5.6, 3.4, 1.2]
Here in the above code, we create there different types of arrays(Int, Float, String). Now we pass > in the by parameter of sort(by:>) method to sort the given array in descending order(high to low).
Conclusion
So by passing the> operator in the sort(by:) method we can sort all the elements of any type of array in descending order. So this is how we can sort the elements of an array in descending order.
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