Bash, short for "Bourne Again SHell," is a powerful scripting language used in Unix-based operating systems. One of the fundamental constructs in Bash programming is the if statement. The if statement allows you to control the flow of your script based on specific conditions. In this article,...
问在bash中使用内联if-statement添加命令参数ENexport export命令将会使得被 export 的变量在运行的脚...
Thethenkeyword is associate with “if and elif statement” and enclose the statements that execute when "if" is true. Always remember to addfiat the end of conditional statements. Example: if Statement In this example, first, a statement reads the user input and then validates that in the i...
Example 3: If statement in bash on less than a number In addition to-eqfor equality you can also try-lt -le -gt -getest conditions for less than, less than or equal, greater than or greater then or equal respectively. Below is a similar example with less then operator-lt: ...
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bash:带if-statement的循环 在我的Bash脚本中,我在目录中的文件循环和一个简单的if-stalal来过滤特定文件。然而,它并不像我期望的行为,但我看不到为什么。 (我知道我可以过滤用于for-循环表达式的文件扩展(... in "*.txt"),但在我实际情况下,条件更复杂。)...
if [ ! -z err−o!−eapk ]; then 会报出-e无法找到的错误; 而if [ ! -z err]||[!−eapk ]; then 没问题; 整数比较 : -eq 等于,如:if [ "a"−eq"b" ] -ne 不等于,如:if [ "a"−ne"b" ] -gt 大于,如:if [ "a"−gt"b" ] ...
statement4 . fi If the conditional expression is true, it executes the statement1 and 2. If the conditional expression returns zero, it jumps to else part, and executes the statement3 and 4. After the execution of if/else part, execution resume with the consequent statements. ...
TL;DR: How Do I Use ‘Else If’ in Bash Scripting? '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 ...
本教程将在 bash 脚本中使用 && 和if 语句。 在Bash 中使用 && 和if 语句 如果$age 等于18 且 $name 等于John,则条件返回真。 age=18 name="John" if [[ $age -eq 18 && "$name" == John ]];then printf "success!!\n" fi 输出: success!!