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I need a string like the following:

"2+2
\"Hello
world\"
3+3"

to be evaluate like

2+2
"Hello 
world"
3+3

Note that ToExpression evaluates that string as

2+2;
"Hello 
world";
3+3

that is that it prints only the last line.

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If I understand your question correctly, the following code

str = "2+2
\"Hello
world\"
3+3";
ToExpression[str, InputForm, Print /@ List[##] &];

does what you want. Alternatively, you can use

ToExpression[str, InputForm, List]

and decide what to do with the list later. The documentation for ToExpression states:

ToExpression[input, form, h]

wraps the head h around the expression produced before evaluating it.

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  • $\begingroup$ Yes, thanks. I came to a similar solution: Print/@(List@@ToExpression[s, Inputform, Hold]). So, in general terms, how would you explain the role of the third argument of ToExpression ? and what is the default function ToExpression calls if the third argument is omitted? $\endgroup$ – Fortsaint Aug 26 at 22:57

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