Open In App

How to Map a Rune to Lowercase in Golang?

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Share
Report issue
Report

Rune is a superset of ASCII or it is an alias of int32. It holds all the characters available in the world’s writing system, including accents and other diacritical marks, control codes like tab and carriage return, and assigns each one a standard number. This standard number is known as a Unicode code point or rune in the Go language.
You are allowed to map the given rune into the lower case with the help of ToLower() function. This function changes the case of the given rune(if the case of the rune is upper or title) into lower case and if the given rune is already present in lower case, then this function does nothing. This function is defined under Unicode package, so for accessing this method you need to import the Unicode package in your program.

Syntax:

func ToLower(r rune) rune

Example 1:




// Go program to illustrate how
// to map a rune to Lowercase
package main
  
import (
    "fmt"
    "unicode"
)
  
// Main function
func main() {
  
    // Creating rune
    rune_1 := 'G'
    rune_2 := 'e'
    rune_3 := 'E'
    rune_4 := 'k'
    rune_5 := 's'
  
    // Mapping the given rune
    // into lower case
    // Using ToLower() function
    fmt.Printf("Result 1: %c ", unicode.ToLower(rune_1))
    fmt.Printf("\nResult 2: %c ", unicode.ToLower(rune_2))
    fmt.Printf("\nResult 3: %c ", unicode.ToLower(rune_3))
    fmt.Printf("\nResult 4: %c ", unicode.ToLower(rune_4))
    fmt.Printf("\nResult 5: %c ", unicode.ToLower(rune_5))
}


Output:

Result 1: g 
Result 2: e 
Result 3: e 
Result 4: k 
Result 5: s 
Result 6: f 

Example 2:




// Go program to illustrate how
// to map a rune to Lowercase
package main
  
import (
    "fmt"
    "unicode"
)
  
// Main function
func main() {
  
    // Creating rune
    rune_1 := 'S'
    rune_2 := 'a'
    rune_3 := 'M'
    rune_4 := 'P'
    rune_5 := 'L'
    rune_6 := 'e'
  
    // Mapping the given rune
    // into lower case
    // Using ToLower() function
    fmt.Printf("Result 1: %c ", unicode.ToLower(rune_1))
    fmt.Printf("\nResult 2: %c ", unicode.ToLower(rune_2))
    fmt.Printf("\nResult 3: %c ", unicode.ToLower(rune_3))
    fmt.Printf("\nResult 4: %c ", unicode.ToLower(rune_4))
    fmt.Printf("\nResult 5: %c ", unicode.ToLower(rune_5))
    fmt.Printf("\nResult 6: %c ", unicode.ToLower(rune_6))
}


Output:

Result 1: s 
Result 2: a 
Result 3: m 
Result 4: p 
Result 5: l 
Result 6: e 


Last Updated : 27 Sep, 2019
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads