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Prashanth Chandra
Prashanth Chandra

Reputation: 2692

Why does my IO.write insert a "%" sign at the end of output?

I use this line to read from temp.dat, which contains "100" 

fahrenheit = IO.read("temp.dat").to_i * 9 / 5 + 32

Now, to write this result in another file;

Method 1

f = File.new("temp.out", "w")
f.puts fahrenheit

cat temp.out

212

Method 2

IO.write("temp.out", fahrenheit)

cat temp.out

212%

Upvotes: 0

Views: 45

Answers (1)

Sergio Tulentsev
Sergio Tulentsev

Reputation: 230346

Why does my IO.write insert a “%” sign at the end of output?

It doesn't. Here's the binary content of the file. That % character is the command prompt of your shell, which is confused by the lack of EOL in the file. POSIX-compliant text files should always end lines with end-of-line character.

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Upvotes: 2

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