CODEWITHSUNDEEP
erlang
sfinnie
sfinnie

Reputation: 9960

print carriage return (not line feed) in erlang?

Wondering if it's possible to print a carriage return without a line feed in erlang? i.e. equivalent to printf("this will be replaced next time \r"); in C.

Had a look through the io:format() documentation and didn't see anything. It only seems to support ~n, equivalent to carriage return+line feed pair ('\n' in C).

Thx.

Upvotes: 3

Views: 2481

Answers (3)

rvirding
rvirding

Reputation: 20936

You can use \r in a string for the return character so:

io:format("Counter value: ~b\r", [Counter])

This is also works for character constants, $\r, and in quoted atoms.

Upvotes: 4

alavrik
alavrik

Reputation: 2161

"\r" is a perfectly valid escape sequence in Erlang. So you can do just

io:format("\r").

Check the reference manual for other escape sequences.

Upvotes: 7

sfinnie
sfinnie

Reputation: 9960

Doh. Answer came almost as soon as I posted. ~c enables printing of ASCII characters, so it's just a case of printing ASCII carriage return (13). e.g.

io:format("Counter value: ~b~c", [Counter,13])

Still interested in anything more elegant...

Thx.

Upvotes: 0

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