Golang – strings.SplitN()

strings.SplitN() is a built-in function in Golang that is used to split a given string into substrings by the given separator. It returns the slices of the substrings between those separators.

Syntax

func SplitN(str, sep string, n int) []string

Where,

• str is the given input string,
• sep is the separator string, and
• n defines the number of substrings that is to be returned.

Example 1

Consider the following example −

package main
import (
   "fmt"
   "strings"
)
func main() {
   // Intializing the Strings
   p := "1, 2, 3, 4, 5, 6, 7"
   q := "Welcome to Golang Programming Language"
   r := "SplitN"
   s := "1.2.3.4.5"
   t := "String/Package/Function"

   // Display the Strings
   fmt.Println("String 1: ", p)
   fmt.Println("String 2: ", q)
   fmt.Println("String 3: ", r)
   fmt.Println("String 4: ", s)
   fmt.Println("String 5: ", t)

   // Using the SplitN Function
   test1 := strings.SplitN(p, ",", 6)
   test2 := strings.SplitN(q, " ", 0)
   test3 := strings.SplitN(r, "N", -1)
   test4 := strings.SplitN(s, ".", 5)
   test5 := strings.SplitN(t, "/", 3)
   test6 := strings.SplitN(q, "to ", -1)
   test7 := strings.SplitN(s, ".", 4)
   
   // Display the SplitN Output
   fmt.Println("\nSplitN for String 1:", test1)
   fmt.Println("SplitN for String 2:", test2)
   fmt.Println("SplitN for String 3:", test3)
   fmt.Println("SplitN for String 4:", test4)
   fmt.Println("SplitN for String 5:", test5)
   fmt.Println("SplitN for String 2:", test6)
   fmt.Println("SplitN for String 4:", test7)
}

Output

It will generate the following output −

String 1: 1, 2, 3, 4, 5, 6, 7
String 2: Welcome to Golang Programming Language
String 3: SplitN
String 4: 1.2.3.4.5
String 5: String/Package/Function

SplitN for String 1: [1 2 3 4 5 6, 7]
SplitN for String 2: []
SplitN for String 3: [Split ]
SplitN for String 4: [1 2 3 4 5]
SplitN for String 5: [String Package Function]
SplitN for String 2: [Welcome Golang Programming Language]
SplitN for String 4: [1 2 3 4.5]

Example 2

Let us take another example.

package main
import (
   "fmt"
   "strings"
)
func main() {

   // Declaring the Variables
   var x string
   var y string
   
   // Intializing the Strings
   x = "Golang Programming Language"
   y = "SplitN-String-Package-Function"
   
   // Display the Strings
   fmt.Println("String 1: ", x)
   fmt.Println("String 2:", y)

   // Using SplitN
   z := strings.SplitN(x, "Programming", 2)
   w := strings.SplitN(y, "-", 3)
   
   // Display the SplitN Output
   fmt.Println("SplitN for String 1:", z)

   // Using the for condition to display outputs of y variable
   for v := range(w) {
      fmt.Println("SplitN Function for String 2: ", w[v])
   }
}

Output

It will generate the following output −

String 1: Golang Programming Language
String 2: SplitN-String-Package-Function
SplitN for String 1: [Golang Language]
SplitN Function for String 2: SplitN
SplitN Function for String 2: String
SplitN Function for String 2: Package-Function