Swift Program to Search an Element in an Array

In this article, we will learn how to write a swift program to search an element in an Array. Here we use the following methods to search elements from the given array: To search

• Using == operator

• Using contains() method

• Using the in function

Method 1: Using == operator

To search for an element from the given array we iterate through each element of the given array and check if the element is equal to the specified element using the == operator. If true, then the specified element is present in the array. Otherwise not.

Algorithm

Step 1 − Create a function.

Step 2 − In this function, use a for loop to iterate through each element of the array.

Step 3 − Check if the current element is equal to the specified element or not using == operator.

Step 4 − If the specified element is found in the array, then this function return true. Otherwise return false.

Step 5 − Create an array of integer type.

Step 6 − Call the function and pass the array and the element which we want to search as parameters in it.

Step 7 − Print the output.

Example

Following Swift program to search an element in an Array

import Foundation
import Glibc

// Function to search specified element in the array
func searchElement(array: [Int], element: Int) -> Bool {
   for ele in array {
      if ele == element {
         return true
      }
   }
   return false
}

// Test case
let arr = [1, 2, 3, 4, 5]
print("Is 4 present in the given array?", searchElement(array: arr, element: 4))
print("Is 10 present in the given array?", searchElement(array: arr, element: 10))

Output

Is 4 present in the given array? true
Is 10 present in the given array? false

Here in the above code, we have an array of integer types. Now we create a function to check if the given element is present in the array or not. So we iterate through each element of the array and check whether the current element is equal to the specified element or not. If the element is found in the given array, then the loop ends and this function returns true. Otherwise, the checking process continues until the end of the array, and this function returns false.

Method 2: Using contains() function

To search for an element from the given array we can also use contains() function. This function is used to check if the specified element present in the given array or not. If it returns true, which means the specified element is present in the array. Alternatively, if it returns false, which means the specified element is not present in the array

Algorithm

Step 1 − Create a function.

Step 2 − In this function, use contains the () function to check if the current element is equal to the specified element or not.

Step 3 − Create an array of integer types.

Step 4 − Call the function and pass the array and the element, which we want to search as parameters in it.

Step 5 − Print the output.

Example

Following Swift program to search an element in an Array

import Foundation
import Glibc

// Function to search specified element in the array
func searchElement(array: [Int], ele: Int) -> Bool {
   return array.contains(ele)
}

// Test case
let arr = [34, 5, 67, 32, 4, 56, 6, 54, 3]
print("Is 32 present in the given array?", searchElement(array: arr, ele: 32))
print("Is 11 present in the given array?", searchElement(array: arr, ele: 11))

Output

Is 32 present in the given array? true
Is 11 present in the given array? false

Here in the above code, we have an array of integer types. Now we create a function to check if the given element is present in the array or not. So we use contains the () function to check if the specified element is present in the given array or not. The contains() function will return true if the element is found in the array. Otherwise, it will return false.

Method 3: Using Function

To search an element from the given array we can also a user define function in which we check if the given element is present in the array or not.

Example

Following Swift program to search an element in an Array

import Foundation
import Glibc

// Function to search specified element in the array
func searchElement(array: [Int], ele: Int) -> Bool {
   var foundele = false
   var i = 0
   while !foundele && i < array.count {
      if array[i] == ele {
         foundele = true
      }
      else {
         i += 1
      }
   }
   return foundele
}

// Test case
let array = [34, 2, 56, 3, 56, 7, 88]
print("Is element = 4 is present in the array?", searchElement(array: array, ele: 4))
print("Is element = 88 is present in the array?", searchElement(array: array, ele: 88)) 

Output

Is element = 4 is present in the array? false
Is element = 88 is present in the array? true

Here in the above code, searchElement function uses a while loop to iterate through the elements of the array. It uses a found flag to track whether the specified element has been found. If the specified element is found, the flag is set to true and the loop is terminated. If the specified element is not found, then the loop continues until the end of the array is reached. The function then returns the value of the found flag.

Conclusion

Therefore, this is how we can search an element in an Array using the discussed methods. All the methods are applicable for any data type (with some minor changes).