case语句
case条件语句的语法格式:
case "变量" in value 1) 指令 1... ;; value 2) 指令 2... ;; value 3) 指令 3... ;; *) 指令 ... esac
实例:
#!/bin/bash RED_COLOR="\E[1;31m" GREEN_COLOR="\E[1;32m" YELLOW_COLOR="\E[1;33m" BLUE_COLOR="\E[1;34m" RES="\E[0m" cat << END ============================= 1.apple 2.pear 3.banana 4.cherry ============================= END read -p "Please input a number to choice." num case $num in 1) echo -e "${RED_COLOR}apple${RES}" ;; 2) echo -e "${GREEN_COLOR}pear${RES}" ;; 3) echo -e "${YELLOW_COLOR}banana${RES}" ;; 4) echo -e "${BLUE_COLOR}cherry${RES}" ;; *) echo "Must be input {1|2|3|4}" esac ~
运行结果:
[root@rhel6 script]# bash case02.py ============================= 1.apple 2.pear 3.banana 4.cherry ============================= Please input a number to choice.1 apple [root@rhel6 script]# bash case02.py ============================= 1.apple 2.pear 3.banana 4.cherry ============================= Please input a number to choice.2 pear [root@rhel6 script]# bash case02.py ============================= 1.apple 2.pear 3.banana 4.cherry ============================= Please input a number to choice.3 banana [root@rhel6 script]# bash case02.py ============================= 1.apple 2.pear 3.banana 4.cherry ============================= Please input a number to choice.4 cherry