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printf

Format and print text. More information: https://www.gnu.org/software/coreutils/printf.

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}}