Welcome to our guide on the for-range loop in Golang! In this post, we’ll dive into live examples, demonstrating how to leverage this powerful loop to traverse elements in arrays, maps, and strings.
What’s Inside
Understanding the Basics: for-range Loop Syntax
Let’s start with the basic syntax:
for index, value := range anyDS {
fmt.Println(value)
}
Here, index represents the index of the value, value is the value for each iteration, and anyDS is the data structure being accessed.
Iterating over Arrays
See the for-range loop in action with an array of employee ages:
package main
import "fmt"
func main() {
ages := [3]int{32, 28, 55}
for i, age := range ages {
fmt.Printf("Array index %d and value is = %d \n", i, age)
}
}
Output:
Array index 0 and value is = 32 Array index 1 and value is = 28 Array index 2 and value is = 55
Unlocking the Power for Maps
Explore the versatility of for-range with maps:
package main
import "fmt"
func main() {
empAgeMap := map[string]int{"Adam": 32, "Joe": 28, "Sam": 55}
for empName, age := range empAgeMap {
fmt.Println("Age of", empName, "is: ", age)
}
}
Output:
Age of Adam is: 32 Age of Joe is: 28 Age of Sam is: 55
Exploring Strings with for-range
Apply the for-range loop to strings, revealing the Unicode representation of each character:
package main
import "fmt"
func main() {
for i, item := range "dquniversity" {
fmt.Printf("string[%d] = %#U\n", i, item)
}
}
Output:
string[0] = U+0064 'd' string[1] = U+0071 'q' string[2] = U+0075 'u' string[3] = U+006E 'n' string[4] = U+0069 'i' string[5] = U+0076 'v' string[6] = U+0065 'e' string[7] = U+0072 'r' string[8] = U+0073 's' string[9] = U+0069 'i' string[10] = U+0074 't' string[11] = U+0079 'y'
Check Also:
