How to make new line in mathematica file output?

Question

I know that new line is classically made by "\n".

I want to make a string with lines of data and then export it into a file:

outString = StringJoin["First Line \nSecond Line"]
Put[outString, NotebookDirectory[] <> "testOut.txt"]

The first line, make a decent output in the Mathematica itself:

"First Line 
Second Line"

But in the testOut.txt file , it is :

"First Line \nSecond Line"

Note that it even includes the quotation marks and both in the same line ! What is the solution for that ?

score 9 · Accepted Answer · edited Apr 22 '20 at 16:03

9

Put[OutputForm[outString], "testOut.txt"]

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compare with

Put[outString, "testOut0.txt"]

enter image description here

Alternatively, you can use Export:

Export["testOut2.txt", outString]
(* or Export["testOut2.txt", outString, "Text"] *)

or, WriteString (thanks: Mr.Wizard)

strm = OpenWrite["testOut2.txt"];
WriteString[strm, outString]
Close[strm]

to get the same result:

enter image description here

edited Apr 22 '20 at 16:03

Nitin

answered Apr 23 '15 at 22:58

kglr

1

Consider also mentioning WriteString +1 – Mr.Wizard Apr 23 '15 at 23:31
Thanks @Mr.W, added WriteStream. – kglr Apr 23 '15 at 23:46
Great ! Thank you – Aug Apr 23 '15 at 23:59
@kglr, is there any way to put linebreak inside WriteString long expression. WriteString by default writes expression(string) as a single line. – BabaYaga Jan 13 '21 at 22:11
@Boogeyman, afaik we can't do it directly with WriteString. You can use WriteLine instead. – kglr Jan 14 '21 at 17:48
1

@kglr, Agree for writing String. But I needed for some different purpose. I am writing a big expression in the form double var = expr for which I find WriteString convenient so far with only problem is that it writes the expression (Text) in a single line. May be I will open a new thread on this. – BabaYaga Jan 14 '21 at 18:00

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