printf命令在Linux脚本编程中的应用场景

printf ???? Linux ????????????,??????????

1. ????:printf ??????????,????????????????:

printf "Hello, World!\n"

2. ???????:printf ???????????????????:

name="Alice"
age=30
printf "My name is %s and I am %d years old.\n" "$name" "$age"

3. ?????:printf ?????????,????????????:

pi=3.14159
printf "The value of pi is approximately %.2f.\n" "$pi"

4. ????:printf ????????,???????????????:

printf "%-10s %-10s %-10s\n" "Name" "Age" "City"
printf "%-10s %-10s %-10s\n" "Alice" "30" "New York"
printf "%-10s %-10s %-10s\n" "Bob" "25" "San Francisco"

5. ???????:printf ???????????????????:

printf "\033[31mThis text is red.\n\033[0m"

6. ?????:printf ?????????,???????????????:

for i in {1..100}; do
    printf "\rProgress: =%%" "$i"
    sleep 0.1
done
echo

7. ???????:printf ?????????????,?????????????:

printf "Current date and time: %s\n" "$(date)"

??,printf ??? Linux ????????????,???????????????????