When trying to understand the working of a function like if-else in a shell script, it is good to start things simple. Here, we initialize two variables a and b, then use the if-else function to check if the two variables are equal. The bash script should look as follows for this t...
2. How do I write an if statement in a shell script? Writing an if statement in a shell script involves specifying a condition and the actions to take if the condition is true. Here’s the basic syntax: if[condition];then# code to execute if condition is trueelse# code to execute if...
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 …….. last_command else command1 command2 …….. ...
if elif else Shell 支持任意数目的分支，当分支比较多时，可以使用if elif else 结构，它的格式为：i...
So far all the if else statement you saw were used in a proper bash script. That's the decent way of doing it but you are not obliged to it. When you just want to see the result in the shell itself, you may use the if else statements in a single line in bash. ...
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Use if else statement Now I add an else statement in the previous script. This way when you get a non-zero modulus (as odd numbers are not divided by 2), it will enter the else block. #!/bin/bash read -p "Enter the number: " num ...
else echo"your input is wrong" fi [root@test65 script]# sh if.sh 请输入你的成绩:90 90, very good! [root@test65 script]# sh if.sh 请输入你的成绩:80 80, good~ [root@test65 script]# sh if.sh 请输入你的成绩:60 60, so so ~~ ...
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shell script 学习笔记---if,for,while,case语句 1、if内的判断条件为逻辑运算: 2、if内的判断条件为目录是否存在,文件是否存在,下图先检验目录/home/monster是否存在,然后再检测/home/monster中的file.txt文件是否存在,这里需要注意的是在进行文件目录是否存在一类的判断时,只能使用"[]"括号。“()”括号一般仅用...