但它返回了：1. if 在shell中语法格式1.1 if-elif-else语法格式if [ command ];thenelif [ comman...
本编程教程将讨论 bash 中的条件结构,尤其是具有单个和多个条件的 if 条件。 Bash 编程简介 Bash 是 UNIX 和 Linux 操作系统中的一个简单的命令行解释器。这个解释器允许我们使用命令行运行一些命令,这些命令可以通过在一个称为脚本的文件中键入它们来共同运行。 shell 脚本只不过是 bash 命令的集合,可以在 bash ...
In bash script, if you wish to apply multiple conditions using if statement then use ‘ if elif else’. In this type of conditional statement, if the first condition is met then code below it will be executed otherwise next if condition will checked and if it is not matched then commands...
bash 中的条件语句，基础就是 Test 。 if 先来个实例： x=5; if [ $x = 5 ]; then e...
if...else Statement if...elif...else Statement Nested if Statements Multiple Conditions Test Operators Conclusion Share: This article will walk you through the basics of the bash if...else statement and explain you how to use it in your shell scripts. Decision-making is one of the most ...
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. Q2. Can I use the if statement to check the existence of a file...
if [ $num -lt 0 ]; then echo "Number $num is negative" elif [ $num -gt 0 ]; then echo "Number $num is positive" else echo "Number $num is zero" fi Let me run it to cover all three cases here: Combine multiple conditions with logical operators ...
ifCONDITION-TO-TEST;then CODE-TO-EXECUTE-1 elifNEXT-CONDITION-TO-TEST;then CODE-TO-EXECUTE-2 elifNEXT-CONDITION-TO-TEST;then CODE-TO-EXECUTE-2 else CODE-TO-EXECUTE-2 fi Note: In the above general syntax that you can include zero, one or multipleELIFconditions in the code block and the...
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 ...
Using a Bash If Statement with multiple conditions Using Nested If Statements Common Pitfalls and Errors Incorrect usage of the single bracket command [ How to solve the Binary Operator Expected Error? Why you should not use the || and && operators instead of a Bash If Statement? Detailed Exam...