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Jose Ricardo Ziviani 395e8eaa54 Add a new page about the printf command

- printf is a bash command that acts like C's printf, supporting format
   strings and modifiers.

Signed-off-by: Jose Ricardo Ziviani <jrziviani@gmail.com>

2015-12-28 19:07:49 -02:00

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printf

Format and print text

Print a text message

printf {{"%s\n"}} {{"Hello world"}}

Print an integer in bold blue

printf {{"\e[1;34m%.3d\e[0m\n"}} {{42}}

Print a float number with the unicode Euro sign

printf {{"\u20AC %.2f\n"}} {{123.4}}

Print a text message composed with environment variables

printf {{"var1: %s\tvar2: %s\n"}} {{"$VAR1"}} {{"$VAR2"}}

Store a formatted message in a variable (does not work on zsh)

printf -v {{myvar}} {{"This is %s = %d\n" "a year" 2016}}