printf
Linux Command – printf ใช้ในการแสดงผลข้อมูลบนหน้าจอ screen
คำสั่ง
printf <text>
$ printf hello hello$
$ printf 'hello\nworld\n' hello world
โครงสร้างคำสั่ง
printf FORMAT [ARGUMENT]...
printf OPTION
รายละเอียด
เป็นคำสั่งที่ใช้ในการแสดงผลข้อมูลบนหน้าจอ screen คล้ายคำสั่ง echo แต่ไม่ได้จบด้วยการขึ้นบรรทัดใหม่ และสามารถใส่ escape character สำหรับอักษรตัวพิเศษ
- \” double quote
- \\ backslash
- \a alert (BEL)
- \b backspace
- \c produce no further output
- \e escape
- \f form feed
- \n new line
- \r carriage return
- \t horizontal tab
- \v vertical tab
Option
--help display this help and exit --version output version information and exit FORMAT controls the output as in C printf. Interpreted sequences are: \" double quote \\ backslash \a alert (BEL) \b backspace \c produce no further output \e escape \f form feed \n new line \r carriage return \t horizontal tab \v vertical tab \NNN byte with octal value NNN (1 to 3 digits) \xHH byte with hexadecimal value HH (1 to 2 digits) \uHHHH Unicode (ISO/IEC 10646) character with hex value HHHH (4 digits) \UHHHHHHHH Unicode character with hex value HHHHHHHH (8 digits) %% a single % %b ARGUMENT as a string with '\' escapes interpreted, except that octal escapes are of the form \0 or \0NNN %q ARGUMENT is printed in a format that can be reused as shell input, escaping non-printable characters with the proposed POSIX $'' syntax. and all C format specifications ending with one of diouxXfeEgGcs, with ARGUMENTs converted to proper type first. Variable widths are handled. NOTE: your shell may have its own version of printf, which usually supersedes the version described here. Please refer to your shell's documentation for details about the options it supports.
กลุ่มคำสั่ง
printf(3)
Reference:
Author: Suphakit Annoppornchai
Credit: https://saixiii.com
[…] tcsh(1), printf(3) […]