printf

Format and print data.
Write the formatted arguments to the standard output under the control of the format.

Syntax
      printf format [argument]...

      printf --help

      printf --version

Options

       The format characters and their meanings are:

       \"     double quote

       \0NNN  character with octal value NNN (0 to 3 digits)

       \\     backslash

       \a     alert (BEL)

       \b     backspace

       \c     produce no further output

       \f     form feed

       \n     new line

       \r     carriage return

       \t     horizontal tab

       \v     vertical tab

       \xNNN  byte with hexadecimal value NNN (1 to 3 digits)

       \uNNNN character with hexadecimal value NNNN (4 digits)

       \UNNNNNNNN
              character with hexadecimal value NNNNNNNN (8 digits)

       %%     a single %

       %b     ARGUMENT as a string with `\' escapes interpreted

       %Wd    Integer `W' digits wide xxxx

       %W.De  Scientific notation x.xxxx e nnn. float, double

       %W.Df  Fixed format xx.xxxx. float, double

       %W.Dg  Variable `W' digits wide,`D' decimals  xxxx.xx

       %q     Output the corresponding argument in a format that can be
              reused as shell input

       %s     Character string char

       and  all C format specifications ending with one of diouxXfeEgGcs, with
       ARGUMENTs converted to proper type first.  Variable widths are handled.
       e.g.  `\0ooo' = an octal number, `\xhhh' = a hex number

The format is a character string which contains three types of objects:

The format is reused as necessary to consume all of the arguments. If the format requires more arguments than are supplied, the extra format specifications behave as if a zero value or null string, as appropriate, had been supplied.

The return value is zero on success, non-zero on failure.

Examples

Print the decimal number 5 followed by a newline (\n)
printf "%d\n" 5
# 5

Print as float (default 6 decimal places)
printf "%f\n" 5
# 5.000000

Print text followed by variable $USER
printf "Hello, $USER.\n\n"

Print multiple lines
printf %s "\
with quotes we can echo
several lines at a time " Display variables distance=15 printf "Distance is %5d Miles\n" $distance # Distance is 15 Miles Echo a list of numbers from 1 to 100, adding 3 digits of Zero padding so they appear as 001, 002, 003 etc: for ((num=1;num<=100;num+=1)); do echo `printf "%03d" $num`; done Use \n anywhere to start a new line: printf "Two separate\nlines\n" # Two separate # lines Print decimal numbers interspersed with text printf "There are %d orders valued at over %d euros.\n" 64 1500 # There are 64 orders valued at over 1500 euros. Print text interspersed with command results printf "This is `uname -s` running on a `uname -m` processor.\n\n" Convert a hex number to decimal $ printf "%d\n " 0xF 15 Convert a decimal number to Hex printf "0x%X\n " 15 # 0xF Convert a decimal number to Octal printf "0%o\n " 8 # 010 Convert an Octal number to decimal printf "%d\n " 010 # 8

“Fortune favours the bold, Fortune favours the brave” ~ Latin proverb

Related:

cat
- Display the contents of a file
less - Display output one screen at a time
more - Display output one screen at a time
Equivalent Windows commands: ECHO - Display message on screen


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