getCharAt() is used to return a character that takes the specified position in the string variable value. The method needs an integer argument that specifies the position. Here, 1 stands for the first character in the buffer sting. If the specified character does not exist, the method returns NULL.
LET mystr = "My string variable value"
DISPLAY mystr.GetCharAt(5) -- displays "t"
DISPLAY mystr.GetCharAt(3) -- displays a whitespace " "
An invalid position will make the method return a blank.