JAVASCRIPT

string uppercase

let txt = "Hello World!";
txt = txt.toUpperCase();

uppercase

/[A-Z]/  : 'must contain one uppercase'

/([a-z])/  : 'must contain one lowercase'

/(d)/  : 'must contain one number'

/(W)/  : 'must contain one special character'

to upper case

let lowerCase = "javascript is fun!";
let upperCase = lowerCase.toUpperCase();

console.log(upperCase);
// "JAVASCRIPT IS FUN!" will log to the console

convert to uppercase

echo example | awk -F 'd' '{ print toupper($1)}'
EXAMPLE		#Example first uppercased outputed

uppercase letter

using System;
public class Demo {
   public static void Main(){
      bool res;
      char val = 'H';
      Console.WriteLine("Value = "+val);
      res = Char.IsUpper(val);
      Console.WriteLine("Is the value an uppercae letter? = "+res);
   }
}

UpperCase

public class Test {

   public static void main(String args[]) {
      System.out.println(Character.isUpperCase('c'));
      System.out.println(Character.isUpperCase('C'));
      System.out.println(Character.isUpperCase('
'));
      System.out.println(Character.isUpperCase('	'));
   }
}