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 ????????????,???????????????????