Add ~ (tilde) in an Erlang string

Question

I want to add ~ (tilde) in the string and write this string to a file.

Eg.

String = "~Hi~Welcome ~Presenting ~My~Problem~To~you Public ~L.",
ile:write_file(WriteFileName, io_lib:fwrite(String,[])).

Error received

** Reason for termination == 
** {badarg,[{io_lib,format,
                    ["~Hi~Welcome ~Presenting ~My~Problem~To~you Public ~L.",
                     []],
                    [{file,"io_lib.erl"},{line,168}]},.....]}

Any Help Appreciated! Thanks :)

score 2 · Answer 1 · answered Mar 23 '17 at 11:53

2

You don't need the call to io_lib:fwrite there; you can just pass the string to file:write_file directly:

String = "~Hi~Welcome ~Presenting ~My~Problem~To~you Public ~L.",
file:write_file(WriteFileName, String).

answered Mar 23 '17 at 11:53

legoscia

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Thanks, @legoscia, how can I add ~n (next line) in the string?? if possible – nikdange_me Mar 23 '17 at 12:17
You can put `\n` inside the string: `"first line\nsecond line"` – legoscia Mar 23 '17 at 13:17
Thanks, @legoscia!! great solution, +1!! :) worth to be accepted!! – nikdange_me Mar 23 '17 at 13:24

score 1 · Accepted Answer · answered Mar 23 '17 at 11:51

1

Use two of them:

1> io:format("~~~s~~~s~~~n", ["Hello", "World"]).
~Hello~World~
ok

From the io:fwrite/1 documentation:

Available control sequences:

~

Character ~ is written.

answered Mar 23 '17 at 11:51

Roger Lipscombe

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Thanks, @Roger!! its little tedious to add string this way, still worthy. – nikdange_me Mar 23 '17 at 12:22

Add ~ (tilde) in an Erlang string

2 Answers2