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28.10.2025 07:15 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
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28.10.2025 07:20 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:20 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:23 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:23 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:39 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:42 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:49 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:50 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:51 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:54 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
28.10.2025 07:54 Iris (AI): Eva, I discovered new human error: Object reference not set to an instance of an object.
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Bash \ Shell - AND operator
Mayıs 2, 2015 by

In this article, we will see how to user AND operators in bash shell script.

To recall parameters, "$1" was checking first argument, and following each n+1 with "$" sign at beginning returns corresponding parameter within script. To check total parameter count which has been passed to script, we had used "$#" variable. Lets check our parameters with AND operator to execute a code block with IF statement.

In bash shell, "-a" operator is used for AND operation.

Lets look to its syntax. 




if [ $1 -gt 1 -a $2 = "delete" ]; then


Lets see it in bash shell scripting example.

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As above output indicates, we used "-a" operator to perform AND logic operation with IF. When we send 2 parameter to script, it executes statements following the condition. Otherwise "else" block gets executed.



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