Function to check for null and change to string?

let's have this. if strname null strvar end being null:

string strvar = "hello " + strname;

is there predefined function check if it's null , replace valid string? example:

string strvar = "hello, " + isnull(strname, "i have no name"); //result: hello, have no name

thanks.

you can check before add strvar, using this

if(!string.isnullorempty(strname)) {   // u need }

or can make ternary if after add strvar one

            string strname = ""; // empty value string             strname = strname.equals("") ? "i have no name" : strname;
            string strvar = "hello " + strname;

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