Let’s define an array of letters first

letters := []string{"a", "b", "c", "d", "e"}

Using the range operator

• With index and value

for i, letter := range letters {
   fmt.Printf("%d %s\n", i, letter)
}

• Only Value

for _, letter := range letters {
   fmt.Println(letter)
}

• Only index

for i := range letters {
   fmt.Println(i)
}

• Without value and index. Just print array values

i := 0
for range letters {
  fmt.Println(i)
  i++
}

Using Only For operator

• Single initialization and post

len := len(letters)
for i := 0; i < len; i++ {
  fmt.Println(letters[i])
}

• Multiple initialization and post statement

len := len(letters)
for i, j := 0, len; i < j; i, j = i+1, j-1 {
  fmt.Println(letters[i])
}

The post Go: Different ways of iterating over an Array and Slice appeared first on Welcome To Golang By Example.