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Improve variables examples (learnshell.org) #851

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5 changes: 3 additions & 2 deletions tutorials/learnshell.org/en/Variables.md
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Expand Up @@ -12,7 +12,7 @@ Referencing the variables
A backslash "\\" is used to escape special character meaning

PRICE_PER_APPLE=5
echo "The price of an Apple today is: \$HK $PRICE_PER_APPLE"
echo "The price of an Apple today is: \$ $PRICE_PER_APPLE"

Encapsulating the variable name with ${} is used to avoid ambiguity

Expand All @@ -27,7 +27,8 @@ Encapsulating the variable name with "" will preserve any white space values
Variables can be assigned with the value of a command output. This is referred to as substitution. Substitution can be done by encapsulating the command with `` (known as back-ticks) or with $()

FILELIST=`ls`
FileWithTimeStamp=/tmp/my-dir/file_$(/bin/date +%Y-%m-%d).txt
echo "The current directory contains the following files and folders:"$FILELIST
echo "The current directory contains the following files and folders:"$(`ls`)

Note that when the script runs, it will run the command inside the $() parenthesis and capture its output.

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