How to find the Index of Last Occurrence of Substring in Go - Step by Step Examples

How to find the Index of Last Occurrence of Substring in Go ?

Answer

To find the index of the last occurrence of a substring in Go, you can use the strings.LastIndex function.


✐ Examples

1 Find Index of Last Occurrence in String

In this example,

  1. We import the strings package for string manipulation.
  2. We create a string variable str with a string value.
  3. We use the strings.LastIndex function to find the index of the last occurrence of a specific substring within str.
  4. The strings.LastIndex function returns the index of the last occurrence of the substring in the string.
  5. Finally, we print the index.

Go Program

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "Hello World, Hello Go"
    lastIndex := strings.LastIndex(str, "Hello")
    fmt.Println("Last index of substring is:", lastIndex)
}

Output

Last index of substring is: 13

2 Find Index of Last Occurrence in Another String

In this example,

  1. We import the strings package for string manipulation.
  2. We create two string variables str1 and str2 with different values.
  3. We use the strings.LastIndex function to find the index of the last occurrence of str2 within str1.
  4. The strings.LastIndex function returns the index of the last occurrence of str2 in str1.
  5. Finally, we print the index.

Go Program

package main

import (
    "fmt"
    "strings"
)

func main() {
    str1 := "apple banana cherry banana"
    str2 := "banana"
    lastIndex := strings.LastIndex(str1, str2)
    fmt.Println("Last index of substring is:", lastIndex)
}

Output

Last index of substring is: 20

Summary

In this tutorial, we learned How to find the Index of Last Occurrence of Substring in Go language with well detailed examples.


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