如果/ then / elseif在bash中工作,如何嵌套?语法在bash中是如何工作的? 这是我的伪代码为C风格,如果其他语句。 例如: If (condition) then echo "do this stuff" elseif (condition) echo "do this stuff" elseif (condition) echo "do this stuff" if(condition) then echo "this is nested inside"...
Bash 支持 if-else 语句,以便你可以在 shell 脚本中使用逻辑推理。 通用的 if-else 语法如下: if [ expression ]; then ## 如果条件为真则执行此块,否则转到下一个 elif [ expression ]; then ## 如果条件为真则执行此块,否则转到下一个 else ## 如果以上条件都不成立,则执行此块 fi 正如你所注意到...
'Else if'in bash scripting, often written as'elif', is used to check multiple conditions in your code. It is used with the syntax,if [firstStatement]; then... elif [secondCondition]; then... else. It’s a powerful tool that allows your scripts to make decisions based on various scen...
使用else if 语句 当有多个表达式(条件)时,可以使用elif(else-if)语句。看下面的例子,我们创建一个名为 age.sh 的脚本: 复制 #!/bin/bashAGE=$1if[$AGE-lt13]; thenecho"You are a kid."elif[$AGE-lt20]; thenecho"You are a teenager."elif[$AGE-lt65]; thenecho"You are an adult."else...
General Syntax of Bash IF ELIF ELSE Below is the general syntax of IF ELIF and ELSE in bash: if CONDITION-TO-TEST; then CODE-TO-EXECUTE-1 elif NEXT-CONDITION-TO-TEST; then CODE-TO-EXECUTE-2 elif NEXT-CONDITION-TO-TEST; then CODE-TO-EXECUTE-2 else CODE-TO-EXECUTE-2 fi Note: In ...
Use if statement in bash Let's create a script that tells you if a given number is even or not. Here's my script namedeven.sh: #!/bin/bash read -p "Enter the number: " num mod=$(($num%2)) if [ $mod -eq 0 ]; then ...
Bash 支持 if-else 语句,以便你可以在 shell 脚本中使用逻辑推理。 通用的 if-else 语法如下: if[expression];then ##如果条件为真则执行此块,否则转到下一个 elif[expression];then ##如果条件为真则执行此块,否则转到下一个 else ##如果以上条件都不成立,则执行此块 ...
Example of running bash script with logical operators in if statement 🏋️ 练习时间 让我们做一些练习吧 😃 练习1:编写一个 Bash Shell 脚本,检查作为参数提供给它的字符串的长度。如果未提供参数,它将打印 “empty string”。 练习2:编写一个 Shell 脚本来检查给定文件是否存在。你可以提供完整的文件路...
Using if-else statement in bash You may have noticed that you don’t get any output when you run theroot.shscript as a regular user. Any code you want to run when an if condition is evaluated to false can be included in an else statement as follows: ...
使用if 语句 决策结构中,最基础的就是if条件判断,bash脚本if语句的基本语法如下: if [ condition ]; then your code fi # 或 if [ condition ] then your code fi # 单独一行格式 if [ condition ];then; echo 'do something'; fi if语句以fi(if倒过来)结束。这是告诉解释器if的代码段到这里结束了。