在Linux的Bash脚本中,条件判断是通过if、elif和else关键字实现的 #!/bin/bash num=10 if [ $num -eq 10 ]; then echo "The number is equal to 10." elif [ $num -lt 10 ]; then echo "The number is less than 10." else echo "The number is greater than 10." fi 复制代码 在这个示例...
如果 num1 小于 num2,则输出 "Number 1 is less than Number 2"。 你还可以使用 if 语句进行比较操作,例如: 代码语言:bash 复制 #!/bin/bash val1=10 val2=20 if [ $val1 -eq $val2 ]; then echo "Values are equal" elif [ $val1 -lt $val2 ]; then echo "Value 1 is less tha...
echo "the first number:" read first echo echo "the second number:" read second echo max2 $first $second return_val=$? if [ "$return_val" -eq "$E_PARAM_ERR" ] then echo "need to pass two parameters to the function." elif [ "$return_val" -eq "$EQUAL" ] then echo "the two...
/bin/bash # Calculate the week number using the date command: WEEKOFFSET=$[ $(date +"%V") % 2 ] # Test if we have a remainder. If not, this is an even week so send a message. # Else, do nothing. if [ $WEEKOFFSET -eq "0" ]; then echo "Sunday evening, put out the gar...
EQUAL=199 max2() { if [ -z "$2" ] then return $E_PARAM_ERR fi if [ "$1" -eq "$2" ] then return $EQUAL else if [ "$1" -gt "$2" ] then return $1 else return $2 fi fi } echo "the first number:" read first echo echo "the second number:" read second echo max2...
elif [ $NUM -eq 100 ]; then echo "$NUM is equal to 100." else echo "$NUM is less than 100." fi else echo "USER_INPUT is not a number." fi fi 在这个脚本中,我们首先检查环境变量 USER_INPUT 是否已设置。然后,我们检查它是否为一个数字,并根据其值输出不同的消息。 希望这些信息能...
/bin/bashnum=7if[$num-gt 10 ];thenecho"Number is greater than 10."elif[$num-eq 7 ];thenecho"Number is equal to 7."elseecho"Number is less than or equal to 10 and not 7."fi 在这个示例中,脚本检查num是否大于 10,如果不满足,则检查是否等于 7。如果两者都不满足,则执行else块中的...
这些比较运算符可以在if语句中使用,用于控制程序的流程。例如,以下是一个使用整数比较的示例: 代码语言:bash 复制 #!/bin/bash num1=10 num2=20 if [ $num1 -eq $num2 ]; then echo "两个数相等" elif [ $num1 -lt $num2 ]; then echo "第一个数小于第二个数" else echo "第一个数大于第...
```bash #!/bin/bash num=10 if [ $num -gt 5 ]; then echo "Number is greater than 5." elif [ $num -eq 5 ]; then echo "Number is equal to 5." else echo "Number is less than or equal to 5." fi ``` ### 5. **循环** Bash支持多种类型的循环,如`for`循环、`while`循环...
numberTwelve variable is equal to 12 你所看到的是if语句的第一行,它在检查变量的值是否真的等于12。如果是的话,语句就会停止,并发出numberTwelve is equal to 12的回显,然后在fi之后继续执行你的脚本。如果变量大于12的话,就会执行elif语句,并在fi之后继续执行。当你使用if或if/elif语句时,它是自上而下工作...