What "Wide character in print" means in Perl (hint: UTF8)

 It means there is a glitch in the matrix - agents are coming!

(further reading)

Easily add colours to bash scripts

RED="$(tput setaf 1)"
GREEN="$(tput setaf 2)"
YELLOW="$(tput setaf 3)"
WHITE="$(tput setaf 7)"
RESET=$WHITE

echo "${RED}An error occurred${RESET}"
echo "${YELLOW}Warning: Be careful${RESET}"
echo "${GREEN}Everything is groovy${RESET}"

(source)

Old, naive way:

GREEN="\[\033[32m\]"
YELLOW="\[\033[33m\]"
RESET="\[\033[0m\]"

Sprintf in Java

import java.text.MessageFormat;

int a = 3;
String b = "coders";

System.out.println(
    MessageFormat.format("{0} Java {1}.", String.format("%04d", a), b)
);

C printf and scanf format specifiers

Format Specifier	Type
%d (or %i)	int
%c	char
%f	float
%lf	double
%s	string
%x	hexadecimal