text,old_text,new_text,instance_num!Replaces existing text with new text in a text string!is the text or the reference to ...

!text,old_text,new_text,instance_num!!Replaces existing text with new text in a text string!is the text or the reference to a cell containing text in which you want to substitute characters!is the existing text you want to replace. If the case of Old_text does not match the case of text, SUBSTITUTE will not replace the text!is the text you want to replace Old_text with!specifies which occurrence of Old_text you want to replace. If omitted, every instance of Old_text is replaced!