st: modifying display

[Pradipto Banerjee <pradipto.banerjee@adainvestments.com>]

I'm trying to create a modified version of display, say display2 which will work the same as display if it is a number, but in case of strings, it will enclose an additional `" ..."' around it. The code I wrote is as follows:

---
program define display2
        capture display `0'
        if _rc ~= 0 {
                capture display `"`0'"'
        }
        else {
                display `0'
        }
        if _rc ~= 0 {
                error 198
        }
        else {
                display `"`0'"'
        }
end
---

Currently it works fine. For instance:
---
. local test = 15
. display2 `test'
15
. local test = "hello"
. display2 `test'
hello
---

I need some help:
1. Firstly, is there a more efficient way to write this code?
2. Secondly, if were to extend this display2 function such that even when I don't include the `...'  it should work, how can I do so? More specifically, I want to modify display2 to make it such that

---
. local test = 15
. display2 test
15
. local test = "hello"
. display2 test
hello
---

Thanks.

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