How do if statements work in Bash?
The if statement starts with the if keyword followed by the conditional expression and the then keyword. The statement ends with the fi keyword. If the TEST-COMMAND evaluates to True , the STATEMENTS gets executed. If TEST-COMMAND returns False , nothing happens; the STATEMENTS get ignored.
What is in Bash if statement?
In Bash, the if statement is part of the conditional constructs of the programming language. The if in a Bash script is a shell keyword that is used to test conditions based on the exit status of a test command. An exit status of zero, and only zero, is a success, i.e. a condition that is true.
How to execute a conditional statement in Bash?
To execute one statement for true condition and another statement for the false condition, if-else statement is used in this example. Create a file named ‘cond3.sh’ and add the following script. Here, $name variable is used to take input from the user and the value of $name will be compared with two values, ‘Neha’ and ‘Nil ’.
Which is true in the if statement in Bash?
Line 12 – Test the size of myfile again. This time it is TRUE. You’ll notice that in the if statement above we indented the commands that were run if the statement was true. This is referred to as indenting and is an important part of writing good, clean code (in any language, not just Bash scripts).
What happens if the first condition returns false in Bash?
If the first ‘if’ condition returns false then the statements of else part will be executed. In the second nested ‘if’ condition, “You will get 10% bonus” message will print for returning a true value and “You will get 5% bonus” message will print for returning a false value. Run the script.
What are the if options in bash script?
If expression with Multiple Conditions Options for IF statement in Bash Scripting If statement can accept options to perform a specific task. These options are used for file operations, string operations, etc.