Go Language
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- go-for-range
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Go for range construct

The for range construct is useful in many context. It can be used to traverse every item in a collection. It is similar to foreach in other languages. But, we still have the index at each iteration in for range construct.

Syntax:

Go For Range Example

import "fmt"
func main() {
   nums := []int{2, 3, 4}
   sum := 0
   for _, value := range nums {// "_ " is to ignore the index
      sum += value
   }
   fmt.Println("sum:", sum)
   for i, num := range nums {
      if num == 3 {
         fmt.Println("index:", I)
      }
   }
   kvs := map[string]string{"1":"mango","2":"apple","3":"banana"}
   for k, v := range kvs {
      fmt.Printf("%s -> %s\n", k, v)
   }	
   for k := range kvs {
      fmt.Println("key:", k)
   }
   for i, c := range "Hi" {
      fmt.Println(i, c)
   }
}

Output:

sum: 60
1 -> mango
2 -> apple
3 -> banana
key: 1
key: 2
key: 3
0 72
1 105

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Go for range construct

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