Regarding Extract Function

i have query related to extract function, will Extract 开发者_如何学JAVAFunction accept ASCII Value?

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The $EXTRACT function when given a string of ASCII characters, will return a substring of that string. for example $EXTRACT("Hello World",1,6) is "Hello"

If you want to extract the ASCII value of a character in a string, use the function $ASCII.

If you want to create a string given the ASCII values, use the function $CHAR.

For example $EXTRACT("ABC",2) is "B" and $ASCII("ABC",2) is the number 66 and the function $CHAR(67,65,66) is the string "CAB".