shell script printf

The printf command is used to format the output and is an enhanced version of the echo command. It is a finite variant of the C-language printf () library function, and is somewhat different in syntax.Note: printf is defined by the POSIX standard,

The printf command mimics the printf () program in the C library.Standard, so scripting with printf is better than using echo portability.printf uses reference text or space-delimited parameters, which can be used outside of the format string in

Shell learning: Shell echo, printf, test command, echotestShell learning: Shell echo, printf, test command Shell echo command Show normal strings echo "hello" Output: hello Double quotation marks can be omitted as follows: echo hello Output:

in the previous section we learned about the Shell's echo command, which we'll learn from the Shell's other output command printf. The printf command mimics the printf () program in the C library. Standard, so scripting with printf is better than

Summarize:(1) printf uses reference text or space-delimited parameters, which can be used to format strings in printf, as well as the width of strings, left and right alignment, and so on. Default printf does not automatically add line breaks like

In the previous section we learned about the Shell's echo command, which we'll learn from the Shell's other output command printf.The printf command mimics the printf () program in the C library.printf is defined by the POSIX standard, so scripting

1) Unix command: Although any Unix command can be used in shell scripts, some more common commands are used. These commands are usually used for file and text operations. Common command syntax and functions: Echo"Some text": print the text on

To become a flexible tool, a qualified script must provide additional information to describe the role of the script, how it is executed, and where it is executed. Like the command, the script also uses parameters. Switches and parameters increase

Ehco and returnreturn   Returned is the status code, function end Return does not return function return value You can return the function return value with echo in front, return the specified function exit status code Echo returns the

In the previous section we learned about the Shell's echo command, which we'll learn from the Shell's other output command printf.The printf command mimics the printf () program in the C library.printf is defined more by the POSIX standard, so a