Understanding Continue Statement

The continue statement can be used in for, while, and repeat-while loops. When encountered, it skips the current iteration and proceeds to the next one. This is particularly useful when filtering specific values from a dataset or when optimizing loop execution.

Example 1: Skipping Odd Numbers in an Array

The following Swift program demonstrates how to use the continue statement to print only even numbers from an array:

import Foundation

let numbers = [25, 18, 9, 44, 61, 32, 55, 88]

print("Even Numbers in the Array:")
for num in numbers {
     if num % 2 != 0 {
         continue // Skip odd numbers
    }
     print(num)
}

Output

Even Numbers in the Array:
18
44
32
88

Example 2: Skipping a Specific Value in an Array

This example demonstrates skipping the value -10 while iterating through an array.

import Foundation

let values = [5, -10, 15, 20, -10, 30]

print("Filtered Values:")
for val in values {
     if val == -10 {
         continue // Skip -10
    }
     print(val)
}

Output

Filtered Values:
5
15
20
30

Example 3: Filtering Short City Names

This example filters out cities with names shorter than 6 characters.

import Foundation

let cities = ["Tokyo", "Berlin", "London", "NY", "Paris", "Oslo"]

print("Cities with names longer than 5 characters:")
for city in cities {
     if city.count < 6 {
         continue // Skip short city names
    }
     print(city)
}

Output

Cities with names longer than 5 characters:
Berlin
London
Paris