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Golang bytes.ToLower() Function with Examples

Golang | bytes.ToLower() Function: Here, we are going to learn about the ToLower() function of the bytes package with its usages, syntax, and examples.
Submitted by IncludeHelp, on September 26, 2021

bytes.ToLower()

The ToLower() function is an inbuilt function of the bytes package which is used to get a copy of the byte slice (s) with all Unicode letters mapped to their lower case.

It accepts one parameter (s []byte) and returns a copy of the byte slice s with all Unicode letters mapped to their lower case.

Syntax:

func ToLower(s []byte) []byte

Parameter(s):

• s : The byte slice to be used to create a copy of the lowercase byte slice.

Return Value:

The return type of the bytes.ToLower() function is a []byte, it returns a copy of the byte slice s with all Unicode letters mapped to their lower case.

Example 1:

// Golang program to demonstrate the
// example of bytes.ToLower() function

package main

import (
	"bytes"
	"fmt"
)

func main() {
	fmt.Printf("%s\n",
		bytes.ToLower([]byte("Every moment is a fresh beginning.")))
	fmt.Printf("%s\n",
		bytes.ToLower([]byte("What we think, we become.")))
	fmt.Printf("%s\n",
		bytes.ToLower([]byte("Be so good they can't ignore you.")))
}

Output:

every moment is a fresh beginning.
what we think, we become.
be so good they can't ignore you.

Example 2:

// Golang program to demonstrate the
// example of bytes.ToLower() function

package main

import (
	"bytes"
	"fmt"
)

func main() {
	var str []byte
	var result []byte

	str = []byte("Every moment is a fresh beginning.")
	result = bytes.ToLower(str)
	fmt.Printf("Original string: %s\n", str)
	fmt.Printf("Lowercase string: %s\n", result)
	fmt.Println()

	str = []byte("What we think, we become.")
	result = bytes.ToLower(str)
	fmt.Printf("Original string: %s\n", str)
	fmt.Printf("Lowercase string: %s\n", result)
	fmt.Println()

	str = []byte("Be so good they can't ignore you.")
	result = bytes.ToLower(str)
	fmt.Printf("Original string: %s\n", str)
	fmt.Printf("Lowercase string: %s\n", result)
}

Output:

Original string: Every moment is a fresh beginning.
Lowercase string: every moment is a fresh beginning.

Original string: What we think, we become.
Lowercase string: what we think, we become.

Original string: Be so good they can't ignore you.
Lowercase string: be so good they can't ignore you.

Golang bytes Package »

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