The **`strings` package** is a `Go` standard library package that contains functions to manipulate UTF-8 encoded strings.

# 
#  The `ToLower()` method

It provides the **`ToLower()` method**, which can convert a string to a lower case.

# 
#  Returns

This returns a copy of the string input where all the Unicode characters are mapped to its lowercase variant.

##
## Syntax

---
```
func ToLower(s string) string
```
---

##
## Arguments

- This method takes a string `s` as input.

- It returns a string which is the lowercase of the input string.

# 
## Code

First, we imported the `fmt` and strings package to our program in the code below:

package main

import (
	"fmt"
	"strings"
)

func main() {
  str1 := "NewYork"
  str2 := "CITY OF DREAMS"

  fmt.Println("Initial Strings")
  fmt.Println(str1);
  fmt.Println(str2);
  fmt.Println("\nAfter Calling ToLower()")
	fmt.Println(strings.ToLower(str1))
  fmt.Println(strings.ToLower(str2))
}

# 
#  Explanation

After importing `fmt` we call the `ToLower()` method with `New York` as the input string. This returns `new york` as it returns a new string after converting it to lowercase.

We then call the `ToLower()` method with `CITY OF DREAMS` as the input string. This returns `city of dreams` after converting the input to lowercase.

We show the output of all these operations using the `Println()` method of the `fmt` package.

##
## Output

The program prints below output and exits:

```
Initial Strings
NewYork
CITY OF DREAMS

After Calling ToLower()
newyork
city of dreams
```

How to convert a string to lowercase in Go

The ToLower() method

Returns

Syntax

Arguments

Code

Explanation

Output

The `ToLower()` method