Z shell is a programming language created in 1990 by Paul Falstad.
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The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a powerful command interpreter for shell scripting. Zsh is an extended Bourne shell with a large number of improvements, including some features of Bash, ksh, and tcsh.. Read more on Wikipedia...
echo "Hello, world!"
#!/bin/zsh echo "Hello World"