Naming the Return Values of a Function in Golang

strings.LastIndexFunc() Function in Golang With Examples

Last Updated : 10 May, 2020

strings.LastIndexFunc() Function in Golang returns the index of string s of the last Unicode code point, which satisfies func(c), or it returns -1 if no matches found.

Syntax:

func LastIndexFunc(s string, f func(rune) bool) int

Here, s is the string and func() is a function.

Return Value: It returns the integer.

Example 1:

// Golang program to illustrate the 
// strings.LastIndexFunc() Function 
package main 
  
// importing fmt, strings and unicode 
import ( 
    "fmt"
    "strings"
    "unicode"
) 
  
// calling main method 
func main() { 
  
    // returns the last index of number. 
    fmt.Println(strings.LastIndexFunc("GeeksForGeeks123", unicode.IsNumber)) 
  
    // returns the last index of number. 
    fmt.Println(strings.LastIndexFunc("23Geeks1", unicode.IsNumber)) 
} 

Output:

15
7

Example 2:

// Golang program to illustrate the 
// strings.LastIndexFunc() Function 
package main 
  
// importing fmt, strings and unicode 
import ( 
    "fmt"
    "strings"
    "unicode"
) 
  
// calling main method 
func main() { 
  
    // returns the last index of letter. 
    fmt.Println(strings.LastIndexFunc("GeeksForGeeks123", unicode.IsLetter)) 
  
    // returns the last index of letter. 
    fmt.Println(strings.LastIndexFunc("23Geeks1", unicode.IsLetter)) 
} 

Output:

12
6

Naming the Return Values of a Function in Golang

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PranchalKatiyar

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