Input and Output
Script output is provided by the echo
and printf
commands, which we described in Screen Output:
$ echo "Hello world" Hello world $ printf "I am %d years old\n" `expr 20 + 20` I am 40 years old
Input is provided by the read
command, which reads one line from standard input and stores it in a
variable:
$ read name
Sandy Smith
<ENTER>
$ echo "I read the name $name"
I read the name Sandy Smith
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