Returns a copy of a given string in all uppercase (capital) letters.

string_upper(str)

Returns: string

With this function you can force a string to contain only upper case characters.

Note: This function only detects the 26 letter english alphabet from A - Z.

str1 = 'Hello World';
str2 = string_upper(str1); 

This will set str2 to 'HELLO WORLD'.

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