isUpperCase

public bool isUpperCase()

A Boolean value indicating whether the string's alphabetical characters are all uppercase letters: true if all alphabetical characters in the string are uppercase letters or false if the string contains at least one non-uppercase letter.

Checks if the string is composed of only uppercase alphabetical letters (A-Z).

1 2 3 4 5 6 7 8 9

import System;   string foo = "FOO"; string bar = "Bar"; string baz = "baz";   Console.log(foo.isUpperCase()); // true Console.log(bar.isUpperCase()); // false Console.log(baz.isUpperCase()); // false