Answered: What does the keyword out mean when it…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

What does the keyword out mean when it is written before an argument to a
method call?

Expert Solution

Step 1

Meaning of “out” key word:

The general syntax of int.TryParse method is shown below:

Int.TryParse(string, out targetVariable)

It contains the string as the first argument and the targertvariable as the second argument.
Here, the first parameter is string type variable that is passed to the method.
The second parameter is out type variable (targetVariable).
Here, the keyword out indicates that the variable targetVariable is used to store the output value, but not the variable that is passed to the method.
The value after conversion is stored in the variable targetVariable.
If the conversion fails, then 0 will be stored in the variable targetVariable.

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