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How to iterate over an Array using for loop in Golang?
  • Last Updated : 05 May, 2020
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An array is a data structure of the collection of items of the similar type stored in contiguous locations. For performing operations on arrays, the need arises to iterate through it. A for loop is used to iterate over data structures in programming languages. It can be used here in the following ways:

Example 1:




// Golang program to iterate over
// an Array using for loop
package main
  
import "fmt"
  
func main() {
  
    // taking an array
    arr := [5]int{1, 2, 3, 4, 5}
    fmt.Println("The elements of the array are: ")
  
    // using for loop
    for i := 0; i < len(arr); i++ {
        fmt.Println(arr[i])
    }
}

Output:

The elements of the array are:
1
2
3
4
5

Explanation: The variable i is initialized as 0 and is defined to increase at every iteration until it reaches the value of the length of the array. Then the print command is given to print the elements at each index of the array one by one.

Example 2: The for loopcan use another keyword return to perform iterations.






// Golang program to iterate over
// an Array using for loop
package main
  
import "fmt"
  
func main() {
  
    // taking an array
    arr := [5]string{"Ronaldo", "Messi", "Kaka", "James", "Casillas"}
    fmt.Println("The elements of the array are:")
  
    // using for loop
    for index, element := range arr {
        fmt.Println("At index", index, "value is", element)
    }
}

Output:

The elements of the array are:
At index 0 value is Ronaldo
At index 1 value is Messi
At index 2 value is Kaka
At index 3 value is James
At index 4 value is Casillas

Explanation: Keyword range sets the scope of iteration upto the length of arr. The variables index and element store then indexes and values of the array respectively.

Example 3: When we don’t need the index, we can ignore it with the blank identifier _.




// Golang program to iterate over
// an Array using for loop
package main
  
import "fmt"
  
func main() {
  
    // taking an array
    arr := []int{1, 2, 3, 4, 5}
    fmt.Println("The elements of the array are:")
  
    // using for loop
    for _, value := range arr {
        fmt.Println(value)
    }
}

Output:

The elements of the array are:
1
2
3
4
5

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