printf "Hello, Shell\n"
printf "Hello, World"
printf "Hello, Linux\n"

printf "%-10s %-8s %-4s\n" 姓名 性别 体重kg
printf "%-10s %-8s %-4.2f\n" 张三 男 70.1234
printf "%-10s %-8s %-4.2f\n" 李四 男 76.5412
printf "%-10s %-8s %-4.2f\n" 王五 女 52.1234

printf "%d %s\n" 1 "abc"
printf '%d %s\n' 1 "abc"
printf %s abcdef
printf %b "\n"
printf %s abc def
printf "%s\n" abc def
printf "%s and %d \n"