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}}