Macintosh Terminal Pocket Guide

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