echo "Year $year is leap year" else echo "Year $year is normal year" fi 注意上面双括号[[ ]]的使用。如果你使用逻辑运算符,则这是强制性的。 通过使用不同的数据运行脚本来验证脚本: Example of running bash script with logical operators in if statement ️ 练习时间 让我们做一些练习吧 练习1:...
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...
'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...
if Statement 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 ...
if [ expression ]; then statements elif [ expression ]; then statements else statements fi the elif (else if) and else sections are optional Put spaces after [ and before ], and around the operators and operands. Expressions An expression can be: String comparison, Numeric comparison, File ...
The “if” statement can be used to check the different conditions in Bash. The different types of comparison operators, logical operators, and options are used with the “if” statement for testing. The uses of the “-z” and “-n” option to test the string values using the “if” ...
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...
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...
Running a with if statement example in bash 你是否注意到,当数字为偶数时,脚本会告诉你,但当数字为奇数时,脚本不会显示任何内容?让我们使用 else 来改进这个脚本。 使用if else 语句 现在我在前面的脚本中添加了一条 else 语句。这样,当你得到一个非零模数(因为奇数不能除以 2)时,它将进入 else 块。
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 ...