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Terminal -- shell script -- script will only read two lines of a file

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Member Since: Feb 03, 2008
Posts: 168
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I'm learning about the read command and wrote this little script to read data from a file:

 while read variable; do
echo $variable
readfile < File.txt
I have three lines in File.txt; each a single word. The script only echoes the first two lines and drops the third one. Can anyone tell me why?

Also, what does the statment

if [ $variable ] mean? Does it mean 'if the value of variable exists....'?

File.txt only consists of the words red, blue and green.
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