bash 脚本中的 Case 语句展开表达式,然后尝试找到与所有模式的匹配。当找到匹配时,将执行所有语句,直到双分号 “;;”。如果没有找到匹配,则将执行 “*)” 模式下提到的语句。 Syntax : case expression in pattern1) statements ;; pattern2) statements ;; pattern3) statements ;; pattern-n) statements ;;...
Case statement is similar to if statement with multiple elif. case statement in bash script expands the expression and then tries to to find the match with all the patterns. When a match is found then all the statements will be executed till the double semicolon (;;). In case it does n...
Exercise 1: Write a bash shell script that checks the length of the string provided to it as an argument. If no argument is provided, it prints 'empty string'. Exercise 2: Write a shell script that checks whether a given file exists or not. You can provide the full file path as the...
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 ...
Bash Copy In this example, the script checks if the variable ‘a’ is greater than 5. If the condition is true, it prints ‘a is greater than 5’. Flow Control with ‘Else If’ ‘Else if’, or ‘elif’, adds more flexibility to your conditional statements. It allows you to check ...
1. Which statements are mandatory to use in an if statement in a bash script? else statements elif statements both, else and elif statements None of the three options provided 2. It is mandatory to have atleast one space before and after each square bracket for checking the condition in an...
If-else-statement-example-bash-script 使用 if-else 比较字符串 #!/bin/bash string1=Debian string...
This lesson will cover bash scripting, in particular conditional statements using If commands. If statements are used to determine if certain actions are to be taken. Several examples of conditional statements will be provided and explained.
Furthermore, enclosing statements in double brackets executes them in C-style, allowing you to process some C-style instructions within. Create a Simple Password Prompt Let’s see a bit more complex application of the if-else in a shell script. ...
In your bash script, you have the flexibility to incorporate multiple if statements as needed. Furthermore, it is entirely possible to nest an if statement within another if statement, creating what is referred to as a nested if statement. ...