procedure allow only specific values for variable

Question:procedure allow only specific values for variable

Posted: Christopher2222 5970 Product: Maple

February 19 2025

In a procedure what is the way to only allow specific values in a variable?

ie/

change:=proc(a::integer, b={10,20,30})#only values 10, 20 and 30 allowed for variable b
a*b;
end proc:

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