replace

Explanation	Deletes the specified length from the specified position in the string and inserts the replacement string at that position.
Call format	var s = replace( string, position, length, replacement string [, processing unit ] )
Return value	Replaced string
Arguments	String string	Original character string
	Integer position	Position to operate in the character string
	Integer length	Length to delete
	String replacement string	String to replace
	Integer processing unit	0: Treat as one character without distinguishing between half-width and full-width 1: Half-width characters are treated as one character, and full-width characters are treated as two characters. If omitted, half-width and full-width characters will not be distinguished. AI does not distinguish between half-width and full-width characters regardless of the argument
Exception	None
Example of use	`var s = "I have a book. I have a pen."; s = replace(s, 9, 4, "pencil"); s = replace(s, 0, 1, "You"); print(s, "\n");`
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