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String to number conversion not working

Hi, I have a regular expression that extracts the Year from a month_year i.e. "August_2020". However, I haven't been able to find the correct syntax to convert the character Year "cYear" to number so I can do math with it. I will appreciate any pointers. Thanks!!

Names Default To Here( 1 );

SelMonth = {"October_2020"};

cYear = (Regex Match (char(SelMonth), "\d{4}") );

//convert character year to number year

nYear = Num ("cYear");  //Scripting Guide p137

//Subtract 1 and get previous year

pYear = (nYear - 1);

//convert previous year to character

cpYear = Char ( pYear);

Scripting

Re: String to number conversion not working

The variable "SelMonth" is a JMP List( i.e. {} ), therefore the value of variable "cYear" is a list

{"2020"}

Assuming there is a reason that "SelMonth" needs to be a List, the simple solution is to reference "cYear" with a subscript to get the value

nYear = Num (cYear[1]);