The “echo” command in Unix is often used in the shell script for displaying/printing messages on the terminal.
There are two uses of the “echo” command.
- “echo” is used for display/print messages on the terminal.
- “echo” is also used to evaluate shell variables.
1. echo to print messages on the terminal.
Echo with options
-n: This option prevents the trailing newline character from being printed. It is useful when you want to display text without a newline at the end.
1 | echo [OPTIONS] [STRING] |
The [OPTIONS] are optional parameters that modify the behavior of the echo command, and the [STRING] is the text or variables to be displayed.
1 | echo -n "Hello" |
1 | Hello |
-e: This option enables the interpretation of escape sequences in the given string.
1 | echo -e "Line 1\nLine 2\tTabbed text." |
1 2 | Line 1 Line 2 Tabbed text. |
Echo Command options
| Option | Description |
|---|---|
| -n | Prevents the trailing newline character from being printed |
| -e | Enables interpretation of escape sequences in the string |
| -E | Disables interpretation of escape sequences |
| -c | Suppresses the trailing newline character (combined with -n) |
2. echo to evaluate shell variables
1 2 | name="Ram" echo "My name is $name" |
1 | My name is Ram |
What does the echo command do
It is used to display message on terminal
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