Iterating Over Arrays

Arrays can potentially contain a large amount of related data, and sometimes, we want to access and modify data in bulk. An easier way to achieve this is by looping through an array to work with its elements collectively.

We can traverse the entire array using a for loop. The len function provides us with the length of the array, which we can use in the loop condition to specify the number of iterations:

index.go


              12345678910
            
package main
import "fmt"

func main() {
    numbers := [] int { 5, 10, 15, 20, 25, 30, 25 }
   
    for i := 0; i < len(numbers); i++ {
        fmt.Printf("Element %d: %d\n", i, numbers[i])
    }
}

In the code above, we employ a for loop to iterate len(numbers) times, where len(numbers) represents the length of the array. Within the loop, we utilize the variable i for indexing and accessing the elements.

The following code increments all odd numbers and squares all even numbers in an array:

index.go


              1234567891011121314151617
            
package main
import "fmt"

func main() {
    numbers := [] int { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }
   
    fmt.Println(numbers)
   
    for i := 0; i < len(numbers); i++ {
        if numbers[i] % 2 == 0 {
            numbers[i] *= numbers[i]
        } else {
            numbers[i]++
        }
    }
    fmt.Println(numbers)
}

¿Todo estuvo claro?

¡Gracias por tus comentarios!

Sección 5. Capítulo 6

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Contenido del Curso

Introduction to GoLang

1. Getting Started

2. Data Types

Integers Floating-Point Numbers Booleans Runes Strings Basic Type Casting String Formatting Challenge: String Formatting Practice

3. Control Structures

Comparison Operators Conditional Statements Conditional Chaining Logical Operators Switch Statement For Loop Break Statement Challenge: Practicing For Loop

4. Functions

5. Arrays and Slices

6. Intro to Structs & Maps

Creating Structs Creating Instances of Structs Data in Structs What are Maps?Map Declaration and Initialization Accessing Map Values Deleting Keys From Maps Challenge: Creating a Structure

Iterating Over Arrays

We can traverse the entire array using a for loop. The len function provides us with the length of the array, which we can use in the loop condition to specify the number of iterations:

index.go


              12345678910
            
package main
import "fmt"

func main() {
    numbers := [] int { 5, 10, 15, 20, 25, 30, 25 }
   
    for i := 0; i < len(numbers); i++ {
        fmt.Printf("Element %d: %d\n", i, numbers[i])
    }
}

The following code increments all odd numbers and squares all even numbers in an array:

index.go


              1234567891011121314151617
            
package main
import "fmt"

func main() {
    numbers := [] int { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }
   
    fmt.Println(numbers)
   
    for i := 0; i < len(numbers); i++ {
        if numbers[i] % 2 == 0 {
            numbers[i] *= numbers[i]
        } else {
            numbers[i]++
        }
    }
    fmt.Println(numbers)
}

¿Todo estuvo claro?

¡Gracias por tus comentarios!

Sección 5. Capítulo 6