1. Bash If..then..fi statement if [ conditional expression ] then statement1 statement2 . fi This if statement is also called as simple if statement. If the given conditional expression is true, it enters and executes the statements enclosed between the keywords “then” and “fi”. If th...
Bash, short for "Bourne Again SHell," is a powerful scripting language used in Unix-based operating systems. One of the fundamental constructs in Bash programming is the if statement. The if statement allows you to control the flow of your script based on specific conditions. In this article,...
Using a Bash If Statement with Conditional Expressions 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 && ...
if [ condition-statement ]; then Commands.. fi 让我们看一个使用 if 条件的示例 bash 脚本。 脚本: #!/bin/bash echo "Enter your marks out of 100: " read marks if [ $marks -gt 100 ]; then printf "You have entered incorrect marks: $marks\n " fi 输出: 使用带有多个条件的 if 语...
'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...
Example 3: If statement in bash on less than a number In addition to-eqfor equality you can also try-lt -le -gt -getest conditions for less than, less than or equal, greater than or greater then or equal respectively. Below is a similar example with less then operator-lt: ...
There are also conditions for file type check: Now that you are aware of the various comparison expressions let's see them in action in various examples. Use if statement in bash Let's create a script that tells you if a given number is even or not. ...
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” ...
Bash conditional statements perform different computations or actions depending on whether a programmer-specified boolean condition evaluates to true or false. These statements are used to execute different parts of your shell program depending on whether certain conditions are true. The ability to branch...
if [ conditions ] then commands fi 1. 2. 3. 4. Example: 让我们比较两个数字并找出它们的关系: read x read y if [ $x -gt $y ] then echo X is greater than Y elif [ $x -lt $y ] then echo X is less than Y elif [ $x -eq $y ] ...