How can I add a character in between two characters in specific order in a string?
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I have a list of elements as strings. For example,
6Li2 17O2 17O C+D3 C+D3 C3 28Si+H3 13C+D3 23Na C2+H4 13C2+H2
Every time there's a number after a letter I want to add a multiplication sign. So H3 would be H*3 but 13C would remain 13C. I was thinking of using if,else statements and use isstrprop to find if it is letter then digit but not sure how to do this. Is there a better way?