echo — Write arguments to standard output

Format

echo argument …

tcsh shell: echo [-n] word …

echo writes its arguments, specified with the argument argument, to standard output. echo accepts these C-style escape sequences:

\a: Bell
\b: Backspace
\c: Removes any following characters, including \n and \r.
\f: Form feed
\n: Newline
\r: Carriage return
\t: Horizontal tab
\v: Vertical tab
\0num: The byte with the numeric value specified by the zero to three-digit octal num.
\–: Backslash

echo follows the final argument with a newline unless it finds \c in the arguments. Arguments are subject to standard argument manipulation.

In the tcsh shell, echo writes each word to the shell's standard output, separated by spaces and terminated with a newline.

tcsh echo accepts these C-style escape sequences:

For more information, see tcsh — Invoke a C shell.

One important use of echo is to expand filenames on the command line, as in:
```
echo *.[ch]
```
This displays the names of all files with names ending in .c or .h—typically C source and include (header) files. echo displays the names on a single line. If there are no filenames in the working directory that end in .c or .h, echo simply displays the string *.[ch].
echo is also convenient for passing small amounts of input to a filter or a file:
```
echo 'this is\nreal handy' > testfile
```

echo is a built-in shell command.

echo uses the following localization environment variables:

See Localization for more information.

echo always returns the following exit status value:

POSIX.2, UNIX System V.

The POSIX standard does not include escape sequences, so a strictly conforming application cannot use them. printf is suggested as a replacement.

sh, tcsh