Is there a ¿ is number function ? in the link editor

Good afternoon all,
I would like to test if a character is a number or a string . ¿ How can I do it ? . I can not find any function in the link editor .
Thanks in advance,

If you use the number() function here are the results you will get:
number("300") returns 300
number("abcde") returns error
number("301abcde100") returns 301
number("abde300") returns error
a better way to test for a number only vs an alphanumeric string is to use the format function like this:
format(300,"#") returns 300
format("300","#") returns 300
format("abcde","#") returns error
format("301abcde100") returns error
format("abde300") returns error
regards, Steve

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