Null Variable Example
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![How to Check If a Variable is Empty/Null in Bash? [4 Methods] - LinuxSimply](https://linuxsimply.com/wp-content/uploads/2023/11/img3-Using-parameter-expansion-for-empty-non-empty-variable-validation-1-300x81.png)
![How to Check If a Variable is Empty/Null in Bash? [4 Methods] - LinuxSimply](https://linuxsimply.com/wp-content/uploads/2023/11/img5-Using-operator-for-empty-variable-validation-1.png)
![How to Check If a Variable is Empty/Null in Bash? [4 Methods] - LinuxSimply](https://linuxsimply.com/wp-content/uploads/2023/11/img6-Using-operator-with-for-non-empty-variable-validation-1.png)
![How to Check If a Variable is Empty/Null in Bash? [4 Methods] - LinuxSimply](https://linuxsimply.com/wp-content/uploads/2023/11/img1-Using-z-option-with-test-command-for-empty-variable-validation-1.png)
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