It will after you learn about the if-else statements in bash shell scripting. Bash supports if-else statements so that you can use logical reasoning in your shell scripts. The generic if-else syntax is like this: if [ expression ]; then ## execute this block if condition is true else g...
Shell中判断语句if中-z至-d的意思 - sunny_2015 - 博客园 https://www.cnblogs.com/coffy/p/5748292.html Conditions in bash scripting (if statements) - Linux Academy Blog https://linuxacademy.com/blog/linux/conditions-in-bash-scripting-if-statements/ Table of conditions The following table list ...
You can alsouse case statements in bashto replace multiple if statements as they are sometimes confusing and hard to read. The general syntax of a case construct is as follows: case "variable" in "pattern1" ) Command … ;; "pattern2" ) Command … ;; "pattern2" ) Command … ;; esac...
Bash conditional statements perform different computations or actions depending on whether a programmer-specified boolean condition evaluates to true or false. These statements are used to execute different parts of your shell program depending on whether certain conditions are true. The ability to branch...
Understanding ‘Else If’ in Bash Scripting ‘Else if’, or ‘elif’ as it’s often written in bash, is a fundamental part of conditional statements in bash scripting. It allows your scripts to check multiple conditions and execute different blocks of code based on the outcomes of these chec...
The uses of both “if –z” and “if –n” statements are explained in this tutorial using multiple examples to help the Bash users to properly apply these statements in their script. About the author Fahmida Yesmin I am a trainer of web programming courses. I like to write article or ...
FAQs (Frequently Asked Questions) related to Bash if statements: Q1. Can I have multiple conditions in a single if statement? A1. Yes, you can combine multiple conditions using logical operators such as && (AND) and || (OR) to create compound conditions within a single if statement. ...
Bash 脚本是在 Linux 环境中完成自动化任务的强大工具。任何编程或脚本语言的关键元素之一都是条件逻辑,在 Bash 中,条件逻辑是通过 if 语句实现的。 在bash 脚本中,if 语句检查一个条件是否为真。如果是,shell 执行与 If 语句相关的代码块。如果语句不为真,则 shell 跳过 If 语句块的末尾并继续执行。
If-statement-Bash-Script-Example if-else Statement 除了普通的 if 语句之外,我们还可以用 else 块扩展 if 语句。基本思想是,如果语句为真,则执行 if 块。如果语句为假,则执行 else 块。 Syntax : if [ condition_command ] then command1 command2 ...
case expression in pattern1) statements ;; pattern2) statements ...