The **`ToUpper()` function**  converts a string to uppercase. 

The following figure shows a visual representation of the `ToUpper()` function.

# 
## Syntax
```c#
string_name.ToUpper()
```
> **`string_name`** is the name of the string which is to be converted to uppercase
## Parameter
The `ToUpper()` function does not require a parameter.

## Return value
The `ToUpper()` function returns a string that is converted to uppercase.  

## Code





class String
{
    static void Main()
    {
        //string
        System.Console.WriteLine("('educative').ToUpper(): "+ ("educative").ToUpper());

        //string with number
        System.Console.WriteLine("('educative09').ToUpper(): "+ ("educative09").ToUpper());
    }
}

What is string.ToUpper() in C#?

Converts a string to uppercase and returns the result. Syntax: string_name.ToUpper(). No parameters.