How to convert a string to uppercase in Golang?

In Golang, you can convert a string to uppercase by using the strings package and the ToUpper function.

Here's an example:

package main

import (
	"fmt"
	"strings"
)

func main() {
	str := "hello world"
	str = strings.ToUpper(str)
	fmt.Println(str)
}

Output:

HELLO WORLD

In this example, we import the strings package and use the ToUpper function to convert the string variable str to uppercase. The ToUpper function returns a new string that contains the uppercase version of the input string, so we assign this new value back to the str variable. Finally, we print the uppercase string to the console.