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bookIterating 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

index.go

copy

              
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

index.go

copy

              
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)
}
question mark

What is the correct way of using a for loop to loop through an array called myArr ?

Select the correct answer

¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

Sección 5. Capítulo 6

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bookIterating Over Arrays

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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

index.go

copy

              
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

index.go

copy

              
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)
}
question mark

What is the correct way of using a for loop to loop through an array called myArr ?

Select the correct answer

¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

Sección 5. Capítulo 6
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