shellscript之简单的if语句

#!/bin/bashecho "Please input a integer:"read interger1if [ "$interger1" -lt 15 ]; thenecho "The integer1 which you input is lower than 15"fi

#!/bin/bashecho "Please input a integer:"read integer1if [ "$integer1" -lt 15 ]then echo "The integer which you input is lower than 15."fi

#!/bin/bashecho "Please input a integer:"read integer1if test "$integer1" -lt "15";thenecho "The integer you input is lower than 15"fi

这里的三种写法，最后执行结果都是一样的。不同的就是then的使用，以及 test关键字和 [ ] 是等同的，都是条件判断的使用。

结果：

~/shell_text $ ./2if_other.shPlease input a integer:14The integer you input is lower than 15