Create an ASCII new line inside a variable?

Dont you also have to put the chr(10)chr(13) in pound signs

for them to actually create the ascii character?

Not in the OP's case. Since the variables and functions are not enclosed in quotes, CF will recognize them as something that must be evaluated (not just plain text).

cfset x = variable1 & CHR(10) & variable2

But the real answer is "it depends". If that function were used inside quotes, you typically do need # signs. Otherwise CF will think chr(10) is just a plain string:

--- does not work ---

cfset x = "appleCHR(10)orange"

--- works ---

cfset x = "apple#CHR(10)#orange"

<cfset stringineed = varibale1 & chr(10) & variable2 & chr(10) & variable3 & chr(10) & variable3>

That doesn't seem to be creating a new line, it creates a space in between the variables.

the value of the variable stringineed something like this

value1

value2

value3