在Bourne Shell中,if语句检查条件是否为真。如果是这样,shell执行与if语句关联的代码块。如果该语句不正确,那么shell将跳出if语句块的结尾并继续。 Syntax of if Statement :if语句的语法 if [condition_command] then command1 command2 ... .. last_command fi Example...
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 the condition possibilities for both the single- and the double-bracket syntax. Save a single exception, th...
在 bash shell 脚本中,If 语句可以以 If、If- else、If- If- else、netsted If 和 case 的形式使用。 If Statement Syntax: if [ condition_command ] then command1 command2 …….. last_command fi Bash 提供逻辑运算符来组合 if 语句中的多个条件,常见的逻辑运算符如下: -eq: 等于 -ne: 不等于 ...
if [ condition_command ] then command1 command2 …….. last_command else ...
1、if语法格式 1.1 if格式 if condition; then commands; fi 1.2 else if 和 else if c...
看起来你的思路是对的，你只需要在“;“然后”语句。而且我会用分号将第一行和第二行分开，而不是...
Linux Shell Scripting Tutorial (LSST) v1.05r3 Prev Chapter 3: Shells (bash) structured Language Constructs NextMultilevel if-then-elseSyntax: if condition then condition is zero (true - 0) execute all commands up to elif statement elif condition1 then condition1 is zero (true - 0) execute...
'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...
else echo “Wrong insertion !” fi string.sh #! /bin/bash word=a if [[ $word == "b" ]] then echo "condition b is true" elif [[ $word == "a" ]] then echo "condition a is true" else echo "condition is false" fi
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 go to next elif [ expression ]; then ## execute this block if condition is ...