The **```strings``` package** is a Go standard library package that contains functions to manipulate UTF-8 encoded strings.
It provides the **```ToUpper()``` method**, which can convert a string to upper case.

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

# Syntax
```go
func ToUpper(s string) string
```

- This method takes the string `s` as input.
- It returns a string which is the uppercase of the input string.

# Code
* We first imported the ```fmt``` and ```strings``` package to our program in the code below.

* We then call the ```ToUpper()``` method with **house of cards** as the input string. The method returns **HOUSE OF CARDS** as it returns a new string after converting it to uppercase.

* We then call the ```ToUpper()```  method with **Game Of Thrones** as the input string. The method returns **GAME OF THRONES** after converting the input to uppercase.

Below is the output of all these operations using the ```Println()``` method of the ```fmt``` package:

package main

import (
  "fmt"
  "strings"
)

func main() {
  str1 := "house of cards"
  str2 := "Game Of Thrones"

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

How to convert a string to uppercase in Go

The strings package is a Go standard library package that contains functions to manipulate UTF-8 encoded strings. It provides the ToUpper() method, which can convert a string to upper case. This returns a copy of the string input where all the Unicode characters are mapped to its uppercase variant. Syntax func ToUpper(s string) string   This method takes the string s as input. It returns a string which is the uppercase of the input string.  