How does if-else work in bash?

  February 13, 2020
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How does if-else work in bash?

Bash If Else Statement

  1. if : represents the condition that you want to check;
  2. then : if the previous condition is true, then execute a specific command;
  3. else : if the previous condition is false, then execute another command;
  4. fi : closes the “if, then, else” statement.

What is in if condition in bash?

The if statement is just a simple conditional statement. If the condition within the if[] evaluates to true then the if code block is executed. Note: In the above example, if we enter a number which is less than 10, then nothing gets printed.

How do I pass an argument in a bash script?

To pass an argument to your Bash script, your just need to write it after the name of your script:

  1. ./script.sh my_argument.
  2. #!/usr/bin/env bash.
  3. ./script.sh.
  4. ./fruit.sh apple pear orange.
  5. #!/usr/bin/env bash.
  6. ./fruit.sh apple pear orange.
  7. © Wellcome Genome Campus Advanced Courses and Scientific Conferences.

Is there else if in bash?

Bash – If-elif-else Statement Example In addition to else-if, we can check for new conditions, if the program goes to else block. The elif (else if) is used for multiple if conditions. In case one if the condition goes false then check another if conditions.

What is in if condition in Unix?

The if statement executes command and determines if it exited successfully or not. The command can be a separate binary or shell script, a shell function or alias, or a variable referencing any of these. Success is determined by a zero exit-status or return value, anything else is failure.

What is in if condition?

The /IF compiler directive is used to test a condition expression for conditional compilation. /IF must be followed by at least one space, and then the condition expression must be specified on the same line. Following the condition expression, the remainder of the line must be blank.